standardize on "Rscons" capitalization

lib/rscons/builders/library.rb

@@ -1,6 +1,6 @@
 module Rscons
   module Builders
-    # A default RScons builder that produces a static library archive.
+    # A default Rscons builder that produces a static library archive.
     class Rscons::Builders::Library < Rscons::Builder
       def default_variables(env)
         {

lib/rscons/builders/object.rb

@@ -1,6 +1,6 @@
 module Rscons
   module Builders
-    # A default RScons builder which knows how to produce an object file from
+    # A default Rscons builder which knows how to produce an object file from
     # various types of source files.
     class Object < Builder
       KNOWN_SUFFIXES = {

lib/rscons/builders/program.rb

@@ -1,6 +1,6 @@
 module Rscons
   module Builders
-    # A default RScons builder that knows how to link object files into an
+    # A default Rscons builder that knows how to link object files into an
     # executable program.
     class Rscons::Builders::Program < Rscons::Builder
       def default_variables(env)