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Update GUI build instructions for 64-bit Windows.
Improve 64-bit VS compiling instructions for GUI.
No extra tricks needed for compiling 64-bit GUI. Though it seems to
work only in command prompt but not in IDE.
Improve 64-bit VS compiling instructions.
Format the instructions being specifically for VS Express editions.
Couple of fixes to VS2010 and 64-bit compile doc.
Add readme file for building Cppcheck for 64-bit Windows.