Updated for new screen sizes

updates the user interface

Updated for larger screens. Code correction for Geometric Mean calcs.

Added the ability to include other calculators

GUI Buttons update

Added Help and Support

Added reviews

Updated for iPhone 5 and iOS 6

Added the ability to specify negative numbers.

Added the ability to specify decimal numbers.  Also as part of the Spread in App purchase added the STDEV calculation.

Added the ability to purchase the Spread Calculator functionality and add it to this App.