TIXI 1.0

• Fixes
  • tixiRemoveAttribute does not remove an attribute
  • tixiCheckAttribute does no longer write an error message when not finding attributes
• New fuctions
  • tixiUIDCheckLinks (new function) performs a check over all nodes with the uID "isLink" and checks if the corresponding uid exists in that data set
• Many functions now print more informative error messages
• Added a Python wrapper for the C-code and DLL handling (no need to manually convert cpython variables to python)