Refactor command kill-word-dwim to use thingatpt
Improve built-in command save-buffers-kill-terminal to kill all process
Fix el-get bootstrap code for its installer

- mark function jkw:el-get-sync-packages as interactive, and remove prefix 'jkw:' from the function name because it isn't internal function.
- fix el-get installer to init ELPA using package.rcp before executing command el-get-elpa-build-local-recipes.
Add support for Mac OS X 10.8 Notification Center using terminal-notifier.app

- variable terminal-notifier-app-path
- function terminal-notifier-notify
Wrap el-get-growl in terminal-notifier-notify to use Mac OS X 10.8 Notification Center with el-get
Add magit config