Merge branch 'release/0.4.1' into develop

Fixes issue #17
Fixes issue #18

* release/0.4.1:
  Bumped to version 0.4.1
  Remove extra argument to dispatch#compile_command
Updated augroup.
Condensed some lines in a/c/buffer.vim
Changed echomsg and updated calls.
Ensure tags were being set local to the buffer and not globally.
Added some more private methods and moved code around.
Swapped echo msg
No longer needed.
Add the tricky echomsg.
Use right method.
Add gemset for test suite.
Add basis of spec_helper for test suite.
Stub out test for augroup.
Stub out the rest of the 77 specs.
Added Rake into the mix.
Added Rspec configuration.
No more backtrace; pointless.
Updated specs.
Add core testing functionality for plugin.

  Updated for `autoload/cmake/cache.vim` for issue #19.
Added Ruby version.