Creating a class that allows accessing objects in the model hierarchy through a namespace
test for accessor
Most of @anserran comments' addressed
Most of @anserran comments' addressed
Merge pull request #321 from jtorrente/accessor

Accessor
Return to the Stage viewport when the frame buffer ends.
Drawing resources are translated when resize happens.
Improved shader program performance.
Merge pull request #324 from RotaruDan/framebufferViewportFix

Return to the Stage viewport when the frame buffer ends.
MeshHelper now uses stage coordinates.
This simplifies the drawing by avoiding unnecessary conversions.
Improved Javadocs.
Added automatic saving in Mockup.
Merge pull request #327 from RotaruDan/framebufferViewportFix

MeshHelper now uses stage coordinates.
Merge pull request #329 from RotaruDan/savingSystem

Added automatic saving in Mockup.
Extended UI widgets to handle erasing functionality.
Added erasing functionality, also undo/redo correctly working.
Fixed small bug while traslating when resizing.
Fixed Windows path problem while saving the drawing.
Improved drawing algorithm.
Fixed a bug that would cause Templates to copy an existing image into the same folder.
Added exit button in the first view
Merge pull request #347 from RotaruDan/Exit

Added exit button in the first view