Removed typos, small bugfixes

Update license due to new icons

Merge pull request SVProgressHUD#216 from ehuynh/master

resolves SVProgressHUD#215

Fix podspec.

Merge branch 'master' of github.com:samvermette/SVProgressHUD

Set podspec's requires_arc to true.

Allow calling show from viewDidLoad.

Update podspec to 0.6.

No longer need the memory warning notification, since the HUD is remo…

…ved/released every time it's dismissed.

Updated podspec to 0.4.