This splits the list of files for CTest to submit into those belonging
to each part. The set is recombined just before submission. Later this
will allow piecewise submissions.
1. Support for showing line numbers when debugging ctest --show-line-numbers
2. Modify the ctest initialization code, so that it can be delayed
3. Handlers now have corresponding command if they were invoked from the command (so far only update actually use that)
4. Start command is simplified and the functionality is moved to CTest
5. Update can perform initial checkout if CTEST_CHECKOUT_COMMAND is set
6. Add test that checks out kwsys and perform tests on the fresh checkout
Bill Hoffman
Brad King
Andy Cedilnik