Stop testing Emacs22 on Travis CI
Merge remote-tracking branch 'origin/pr/2'

* origin/pr/2:
  Make all the tests passed
  delete miscommitted *.elc files
  Change to use `rake ruby-version@gemset-name do' and corresponding test. And implement `octomacs-format-rake-test-with-args' with a single non-list args.
  bux fix: use `rvm-activate-cooresponding-ruby' instead of `rvm--rvmrc-locate' whitch is obsolete
Ignore compiled elisp files
Standardize indentation in unit tests
Add Contributors section to the README