toggle-read-only is deprecated for read-only-mode

Per emacs 24.3, this just updates it to use the new name and clears the
compilation warning.
Merge pull request #14 from dgtized/modernize-toggle-read-only

toggle-read-only is deprecated for read-only-mode
Code cosmetics.
Add finding stylesheet files [#8].
Add projectile-find-feature command.
Make projectile-rails-current-resource-name namespace aware.
Bump version.
Move some code from ecukes' before callback to setup.
Make ecukes return 0 exit code.
Create test/setup.el file.
Commit .travis.yml file.
Add the badge. Uncomment failing emacs versions.
Add projectile-rails-extract-region command.
Mention the projectile-rails-extract-region in the README.
After extracting the region insert the render statement.
Add projectile-rails-server command.
Do not check for file existence when making a button.
Add projectile-rails-server command to the keymap.
Terminate the server process also when shutting down emacs.
Make projectile-rails-root make less calls to file-exists-p [#16].