* Add `IPA Manager.app` v2.2.1
IPA Palette is a palette-class input method for OS X 10.5 and later.
It makes possible point-and-click input of International Phonetic
Alphabet symbols into Unicode-savvy applications.
* Update ipa-manager.rb
* Added minimum macOS version, and zapping preferences, caches, and plists
* corrected misspelling of checkpoint
* renamed ipa-manager to ipa-palette to reflect the way the application is referred to on the website and in general use (IPA Manager is just the app installed that manages the IPA Palette tool)
* corrected spacing and formatting of zap delete list
* Update and rename ipa-palette.rb to ipa-manager.rb
lwolfsonkin