Open .jbuilder files in ruby-mode
C-M-h is more useful as mark-defun
Minor rewording
Pull in upstream changes from bbatsov/master
Remove some problematic menu-bar-mode logic
A few minor changes regarding OSX support
Remove poorly supported magithub package
fix ensure module exec-path-from-shell
Merge pull request #283 from marivas/fix-ensure-module-prelude-osx

fix ensure module exec-path-from-shell
Pull in upstream changes