Add a CRegQWord helper class to write QWORDs to the registry.

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk@25889 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac
Fix compiler warning.

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk@25890 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac
Add a new command to sync settings.
Far from finished yet, just a first commit.
Update issue #666

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk@25891 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac