Fix the initial frame size.
Merge branch 'emacs-24'
Do not try to create tag files at visiting other .rb files than rails.

* This fix updates two functions.
  - tnoda/rinari-tags-command
  - tnoda/rinari-tags-update
Add comint's prompt patterns for inf-ruby using pry.

* inf-ruby-first-prompt-pattern
* inf-ruby-prompt-pattern
Enable ruby-electric on every ruby-mode buffer.
Switch anything-command-map-prefix-key from M-@ to "C-c a".
Install flymake-easy.

flymake-ruby depends on flymake-easy. However, its recipe does not
include the dependency information.