Update Font Awesome to 4.0.3

Retains the asset_path modifications in fontawesome.css.erb and LESS variables specified in fontawesome.less and used in path.less
adding MIT license to gemspec - fixes #676
Merge pull request #682 from caarlos0/add-license-to-gemspe

adding MIT license to gemspec
Merge pull request #679 from f3ndot/master

Update Font Awesome to 4.0.3
Update README.md

Fixed various typos and spelling
Merge pull request #684 from coolbeans7/patch-1

Update README.md
Fixed 'already initialized constant BootstrapFlashHelper::ALERT_TYPES' warning
Merge pull request #688 from riverock/fix_constant_warning

Fixed 'already initialized constant BootstrapFlashHelper::ALERT_TYPES' w...
Merge original/master
Remove show link in index