Added .idea to gitignore
Rename `perform:` and `propertyName`  selectors.

They were unfortunately identical to selectors used in Apple private APIs.
Previously their presence would be detected by Apple during static analysis,
causing a warning to appear when submitting binaries to the App Store that
included Blindside.
Upgrade to latest version of Cedar

This caused a formerly empty test to appear as pending,
so I deleted the empty, assertionless test.
Merge pull request #19 from wileykestner/master

Binaries that use blindside should not receive a static analysis warning from Apple when uploaded to iTunesConnect