Plteditortool

Official Release of Version using PyQT interface
Updates include:
1) Changed interface to a PyQT interface
2) Fixed functionality of the share-x and share-y options in the plots
3) Changed mathtext font to align with serif based fonts used for labels

This version updates:
1) The interface now uses QT rather than tkInter
2) Minor fixes to the share-x and share-y functionality
3) Inclusion of a section that allows for a figure level header

Update to sharex sharey functionality

Minor update to save plot code

Fix for icon

Removed Icon until it can be applied correctly