Testing action sheet with nil values.
Action Sheet now handles nil values for addButtonWithTitle:... methods
Alert View now handles nil values for addButtonWithTitle:... methods
Working on test cases for action sheet. Preparing file for alert view tests.
Fixed an issue where an action sheet was presentable without any buttons and therefore not dismissible.
Further testing MTZActionSheet properties
Merge branch 'master' of https://github.com/mdznr/Rewritten-APIs