Fixed an issue where headings were not able to be removed when tapping on the heading button again.
Added a new option to hide or show keyboard when the editor loads.
Removal of private API usage. Fixes issue #17 where an app using ZSSRichTextEditor was being rejected by XCode. NOTE: Removal of this code brings back additional options when you have selected text, but these have been deemed acceptable in light of the privite API submission issue.
Removed code that was not needed.