TODO TTCalc
===========

* To add the test when program is being starded which checks if the coordinates of the
  main window actually pointing
  at the valid area (for example when someone take his configuration file into a
  new computer)
* To add some physical constants
* To make the help 
* To resize the last column in lists (variabies and functions) to the main window
* To block the possibility of putting digits as names of variables and funtions