- add ceedling/cmock/unity as testing framework and support

- unified makefile project for the whole repos
- new separate project for tests

tests/vendor/ceedling/lib/ceedling.rb

@@ -0,0 +1,27 @@
+require 'rake'
+
+ERR_MSG = <<EOF
+I expected to see a project.yml file in the current directoy. Please create one
+by hand or by using the 'ceedling' shell command.
+EOF
+
+def ceedling_dir
+  File.join(
+    File.dirname(__FILE__),
+    '..')
+end
+
+def builtin_ceedling_plugins_path
+  File.join(
+    ceedling_dir,
+    'plugins')
+end
+
+ceeling_lib_rakefile = File.join( ceedling_dir,
+                                 'lib',
+                                 'rakefile.rb')
+if File.exists? "./project.yml"
+  load ceeling_lib_rakefile
+else
+  $stderr.puts ERR_MSG
+end