- Several minor improvements
- Added module level docstrings to each file
- Added exponentiation (x ** y)
- Updated square, square root, and inverse to add to calculation instead of being immediate
- Added a double click action to the variables popup window
- Moved the parser functions into supportfuncs.py and added tests for parser ([3](https://github.com/tombroth/guicalculator/issues/3))
- Split default variables and user variables ([5](https://github.com/tombroth/guicalculator/issues/5))
- Reworked buttoncfg.py ([2](https://github.com/tombroth/guicalculator/issues/2))
- Moved operator map out of buttoncfg.py ([1](https://github.com/tombroth/guicalculator/issues/1))