Add *.pyc to .gitignore

Useful for sublime plugin development
Add links to key bindings to package settings menu.

Also, remove unnecessary keys  "caption" and "mnemonic".
Implement new API

* Add js_lint_folder and js_lint_containing_folder commands.
* Rename jslint to js_lint_file command.
* Add js_lint_exec helper command.
* Rename Default.sublime-commands to JSLint.sublime-commands as this is
the standard.
* Update context menu.
* Add menu item "JSLint Folder" to side bar context menu.
* Update sublime-commands.
Update settings.
Fix link to default settings.
Add node-jslint v0.1.9.

This way linting multiple files (folders) is easy. Plus, it's nice to
use the standard.
Add jslint command to support the old api of this package.
Add node-jslint dependencies. (Whoops...)
Update settings file.
Bring back the old keymap.
Add run_on_save option.
Pretty print this badass.
Remove debug print...
Add old Sublime-JSLint options.
Update .gitignore
Update README.md
Add os-specific information to settings file.
Update README.md
Merge branch 'development' of https://github.com/janraasch/Sublime-JSLint into janraasch-development

Conflicts:
	README.md