Added ability to use modifier keys by themselves to AccelLineEdit
+ fix mesh triming
+ fixes #0001617: typo in importCSG.py
+ fix mesh trimming
+ use XMLString::release to free memory
+ fixes #0001614: Provide proper Error Message for corrupt xml files
ViewProvider::keyPressed passes a SoKeyboardEvent instead of bool and int

This allows us to get the modifier key states in keyPressed().
Merging to get new Sketcher keyboard shortcuts for testing
Merge branch 'sketcher-cancel-auto-constraints' into keyboard-commands

Conflicts:
	src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
Debugging
+ add missing files to install target of Sketcher module
Arch: Fixed bugs when working without GUI
index on keyboard-commands: f70303d Debugging
WIP on keyboard-commands: f70303d Debugging
I hate git, so far.
remove all references to BRepMesh
Close to done with this patch...

Finished implementing commands that don't have Actions, but do have
changeable keyboard accelerators.  This includes default behaviour for
custom accelerators, changing them via the GUI, saving/restoring automagically.

Still to do is fleshing out the CommandBase::keyEventMatches function, and
probably a few things I'm forgetting...
This branch adds a mouse cursor to the 'Measure Distance' tool.
+ fix broken copyright notice
+ Replace OCC_HEX_VERSION with OCC_VERSION_HEX