promote CHANGELOG.md section levels

CHANGELOG.md

@@ -1,80 +1,78 @@
-## ChangeLog
+## v1.17.0
 
-### v1.17.0
-
-#### New Features
+### New Features
 
 - allow construction variable expansion on `true` and `false` values.
 - remove makefile target name check when parsing dependencies
 
-### v1.16.0
+## v1.16.0
 
-#### New Features
+### New Features
 
 - Add `Rscons.glob`
 - Support command-line variables
 - improve debuggability of `cache.up_to_date?`
 - allow passing a VarSet into cache methods
 
-#### Fixes
+### Fixes
 
 - generate dependencies for D builds
 
-### v1.15.0
+## v1.15.0
 
 - allow json 1.x or 2.x
 
-### v1.14.0
+## v1.14.0
 
-#### New Features
+### New Features
 
 - #45 - Add `Rscons::VarSet#values_at`
 
-#### Fixes
+### Fixes
 
 - #44 - `Environment#print_builder_run_message` should support string commands
 
-### v1.13.0
+## v1.13.0
 
-#### New Features
+### New Features
 
 - #43 - Add ability to record side-effect file production
 
-### v1.12.0
+## v1.12.0
 
-#### New Features
+### New Features
 
 - #40 - env.depends should imply `env.build_after`
 - #41 - be more colorful
 
-#### Fixes
+### Fixes
 
 - #39 - wait for in-progress subcommands to complete on build failure
 - #42 - cloned Environments should inherit `n_threads`
 
-### v1.11.1
+## v1.11.1
 
-#### Fixes
+### Fixes
 
 - fix the circular build dependency detection logic
 
-### v1.11.0
+## v1.11.0
 
-#### New Features
+### New Features
 
 - Change default Environment :clone option to :all to clone all attributes
 - #38 - raise error when circular dependencies are found
 - #34 - Allow overriding `n_threads` on a per-Environment level
 
-#### Fixes
+### Fixes
 
 - #35 - `env.build_after` should expand paths
 - #36 - `SHCFLAGS` and `SHCXXFLAGS` should inherit non-SH flags by default
 - #37 - Fix non-blocking thread-wait if `Rscons.n_threads` is set to 0
 
-### v1.10.0
+## v1.10.0
 
-#### New Features
+### New Features
 
 - #23 - add parallelization - builds are now parallelized by default
 - #31 - add LEXSUFFIX, YACCSUFFIX construction variables
@@ -84,29 +82,29 @@
 - Add builder features
 - #8 - add SharedObject and SharedLibrary builders
 
-#### Fixes
+### Fixes
 
 - expand target and source paths before calling `Builder#create_build_target`
 - #29 - fix `PROGSUFFIX` handling
 - #32 - Pre-build hooks do not respect modified key values
 
-### v1.9.3
+## v1.9.3
 
 - `Environment#parse_flags` should put -std=XXX flags in CCFLAGS, not CFLAGS
 
-### v1.9.2
+## v1.9.2
 
 - allow phony targets in conjunction with build roots
 
-### v1.9.1
+## v1.9.1
 
 - change *SUFFIX defaults to arrays
 - add various C++ file suffixes
 - use ${INCPREFIX} instead of hard-coded "-I" in Preprocess builder
 
-### v1.9.0
+## v1.9.0
 
-#### New Features
+### New Features
 
 - #6 - add Install and Copy builders
 - #22 - allow overriding Command builder short description with `CMD_DESC` variable
@@ -115,18 +113,18 @@
 - #26 - support registering multiple build targets with the same target name
 - #27 - add Directory builder
 
-#### Fixes
+### Fixes
 
 - #20 - fix variable references that expand to arrays in build target sources
 - #21 - rework Preprocess builder to consider deep dependencies
 - fix `Rscons.set_suffix` to append the given suffix if the filename has none
 - remove ${CFLAGS} from default `CPP_CMD`
 
-### v1.8.1
+## v1.8.1
 
 - fix Environment#dump when construction variables are symbols
 
-### v1.8.0
+## v1.8.0
 
 - new Command builder to execute arbitrary user commands
 - new SimpleBuilder class
@@ -134,23 +132,23 @@
 - improved YARD documentation
 - add Environment#dump to debug Environment construction variables
 
-### v1.7.0
+## v1.7.0
 
 - allow build hooks to register new build targets
 - add post-build hooks (register with `Environment#add_post_build_hook`)
 - clear all build targets after processing an Environment
 - allow trailing slashes in arguments to `Environment#build_dir`
 
-### v1.6.1
+## v1.6.1
 
 - add DEPFILESUFFIX construction variable to override dependency file suffix
 - fix Environment#depends to expand its arguments for construction variables
 
-### v1.6.0
+## v1.6.0
 
 - support lambdas as construction variable values
 
-### v1.5.0
+## v1.5.0
 
 - add "json" as a runtime dependency
 - update construction variables to match SCons more closely
@@ -163,21 +161,21 @@
 - update specs to RSpec 3.x and fix to run on MinGW/Cygwin/Linux
 - add YARD documentation to get to 100% coverage
 
-### v1.4.3
+## v1.4.3
 
 - fix builders properly using construction variable overrides
 - expand nil construction variables to empty strings
 
-### v1.4.2
+## v1.4.2
 
 - add `Environment#expand_path`
 - expand construction variable references in builder targets and sources before invoking builder
 
-### v1.4.1
+## v1.4.1
 
 - fix invoking a builder with no sources while a build root defined
 
-### v1.4.0
+## v1.4.0
 
 - add CFile builder
 - add Disassemble builder
@@ -193,18 +191,18 @@
 - fix `Cache#mkdir_p` to handle relative paths (Issue #5)
 - flush the cache to disk if a builder raises an exception (Issue #4)
 
-### v1.3.0
+## v1.3.0
 
 - change Environment#execute() options parameter to accept the following options keys:
   - :env to pass an environment Hash to Kernel#system
   - :options to pass an options Hash to Kernel#system
 
-### v1.2.0
+## v1.2.0
 
 - add :clone option to Environment#clone to control exactly which Environment attributes are cloned
 - allow nil to be passed in to `Environment#build_root=`
 
-### v1.1.0
+## v1.1.0
 
 - Change `Cache#up_to_date?` and `#register_build` to accept a single target
   file or an array of target file names