Invalidate FilterModel correctly

 * change as proposed by R. Khlebnikov
Implemented 64 bit address handling of treeitems and nodes

Added new QMITK Mime types and functions for encoding/decoding the
addresses. The current system still exists and will work but has been
declared deprecated and will be removed at a future time

Removed debug output
Merge remote-tracking branch 'origin/bug-18025-Fix-Invalidation-FilterModel' into bug-17543-64-bit-pointer-crash
Merge branch 'bug-18025-Fix-Invalidation-FilterModel'
Merge branch 'bug-17534-fix-64-bit-pointer-crash'