feature 0.2.4

* Adds distribution builds of `jquery.hotkeys.js` to `dist/` folder.
* Adds `bower.json` to project.
* Adds `.jshintrc` with default settings.
* Adds `.gitignore` with basic defaults.
* Cleanup of `package.json` and bumps version number.
* Removes unnecessary `hotkeys.jquery.json` file.
* Moves `jquery.hotkeys.js` to `src/` folder. Adds jshint fixes to `jquery.hotkeys.js`.
* Moves jquery and test html files to `test/` folder.
* Updates to Gruntfile.js
  * Adds `meta` section.
  * Adds `clean` task.
  * Adds `concat` task.
  * Adds `uglify` task.
  * Updates `jshint` task to point to `.jshintrc`.
  * Updates `default` task to include clean, concat, and uglify tasks.