History updates
Version 1.31 - September 2013
Fix display in iOS7

Version 1.3 - September 2013
Compatibility with iOS 7

Version 1.2 - July 2013
Reuse the results of history.
Access to history (answer) for the value of the constants and variables.
Assigning the value in the calculator to the first variable in the formula selected in the list or the history.
Automatic calculation of formulas.
Update preferences menu.
Update user guide.
Minor bug fixes.

Version 1.1.1 - June 2013
Bug fix - calculation of maximum number of formulas for the LITE version.

Version 1.1 - May 2013
Text of keyboard keys in colors.
Examples of formulas, constants and variables.
Direct access to the details of formulas, constants and variables.
Update user guide.
Bug fixes.

Version 1.0 - March 2013
Initial release