Added Unit Tests for PanZoomWidget.
Minor change to PanZoomWidget - heights gets updated when the width is updated (originally it was assumed the height was set to auto).
Refactored a function in PanZoomWidget.
Merge pull request #131 from blackhydrogen/resource-image

Added Unit Tests for PanZoomWidget.
Merge pull request #132 from blackhydrogen/boilerplate

Moved resource viewer events to the global constants variable
refactoring
Merge pull request #133 from blackhydrogen/resource-timechart

refactoring
Fixed closing and fullscreen toggling actions being swapped