Adds grunt-phonegap.
Updates Gruntfile to use grunt-phonegap. Adds default config.xml.
Updates Grunfile for icons and screens. Fixes config.xml.
Removes unecessary file.
Merge pull request #186 from gabrielpoca/master

Adds grunt-phonegap to automate build process.
feat(ionic): start over from scratch with ionic-framework
feat(ionic): convert most of the app to ionic
feat(ionic): start using files from web (eventually will move those files to habitrpg-shared, and add mixin arguments for custom display for web/mobile)
feat(ionic): start converting notification to ngAnimate
feat(ionic): task colors
feat(ionic): use +avatar() mixin from web jade files
feat(ionic): add facebook login & register button
feat(ionic): sync/refresh button
feat(ionic): proper use of ion-view & ion-tab, cleanup mixins
feat(ionic): minimal sidebar avatar
feat(ionic): bring gold/silver in, cleanup some profile view
feat(ionic): bring in profile page from website
feat(ionic): use translations
feat(ionic): cleanup inventory displays
feat(ionic): convert res/* icons and config.xml