Fixed a bug where closing the app reset the failed attempts counter.

Improved failed attempts logic: it now doesn’t reset unless when password is entered successfully, or app is killed.
Removed deprecated methods.

When pushed, the rotation wasn’t handled.

Tidied up defaults loading.

SFHFKeychainUtils renamed to LTHKeychainUtils to avoid conflicts with…

… SFHFKeychainUtils already present in the project.

All the rights and thanks go to the original author, Buzz Andersen.

Added `+deletePasscodeAndClose`.

Improved doc a bit.

Fixed the README.

That was embarasing.

Updated Readme and improved the docs.

Improved logic for last bullet appearance.

Doc & code improvements.

Better encapsulation.
Removed ivars in favor of properties.
Added kCoverViewTag constant to replace the hard coded 99.

Readme update.