+ Apply Jim's fix of typos
Fix some spelling
fix in get visible faces
fis for fix for spelling....
add SVG icons for the Class Browser

Created new svg icons to replace the 7 png icons in
src/Gui/Icons/ClassBrowser
and made FreeCAD use them
History and Save managment in InputField
deactivate Project view
Switching the UnitsApi to the new Quantity system
new userString methode
Some fixes in the unit system
fix error of gcc and remove old parser code.
Small clearifikation about the usage of Units interface
Implement the three major unit system schemas
+ Fix compiler warnings with OCC 6.6
+ Suppress boost warning
+ Fix gcc build error
some fixes and comparison interface for Unit and Quantity python objects
fix semicolon in Init script
+ fixes #0000282, + fixes #0001028
+ add comments