Add tasks - close #139

build_tests/sh/sh.rb

@@ -1,4 +1,4 @@
-build do
+default do
   sh "echo", "hi  there"
   sh(["echo  1  2"])
 end

build_tests/sh/sh_fail.rb

@@ -1,4 +1,4 @@
-build do
+default do
   sh "foobar42"
   sh "echo", "continued"
 end

build_tests/sh/sh_fail_continue.rb

@@ -1,4 +1,4 @@
-build do
+default do
   sh "foobar42", continue: true
   sh "echo", "continued"
 end