Adding new MyCal project files

*Handles Decimal style numbers while the user is in the middle of an
input
*Added new iOS icons
*New design
*String will resize to fit in display
*Added a maximum limit of characters
*Added maximum limit of decimals
*Self equals when the operation is pressed again to continue making
operations without pressing the equal button
*Secure operations to only be executed once even if the user keep
pressing and not entering another number
*A ton of new checks to provide similar experience as native iOS7
iPhone calculator