Explicitly state iOS version in pod spec
Merge pull request #54 from plackemacher/master

Explicitly state iOS version in pod spec
changed margins for a specific app; auto-switch between center and left-justified message
Merge branch 'master' of https://github.com/Sumi-Interactive/SIAlertView
found a race condition: a global variable is used to prevent SIAlertView from being shown in a callback block, but the flag doesn't work except when animations are shown down in the simulator
added an accessoryView to show any content in SIAlertView; tweaking the margins
added useful constructor