Merge pull request #233 in CASA/casa6 from CAS-13188 to master
* commit '59747bb81979eff28c60fb6577727d57ddbcde6a':
Remove oldsplit, tclean2, caltabconvert from casa.py
Remove accum import from casa.py CAS-13188 : Modified deprecation warning to clarify absence in casa6 CAS-13188 : Changed the clean deprecation message to clarify presence in casa5 but not in casa6. Removed stray files related to caltabconvert. CAS-13188 : Modified XML categories to prepare for auto-generated documentation. CAS-13188 : Removed task_oldsplit as it already had deprecation warnings in it. Also, added 'visibility='deprecated'' XML tags to oldstatwt and plotcal which are getting deprecation messages only now. CAS-13188 : Deleting .py and .xml for accum, caltabconvert, tclean2 and removing commented-out entries for them from corresponding CMakeLists. CAS-13188 : Removed task_caltabconvert from CMakeLists. Added deprecation warnings at runtime and in the xml for task_plotcal, task_oldstatwt, task_oldsplit. CAS-13188 : Removed task_accum and task_tclean2 from CMakelists for casa5 but let the .py files remain in the directory. Remomved task_accum from setup.py for casa6. For casa6, also deleted the casa6 copy of task_accum.py. CAS-13188 : Made two task documentation updates (initweight, simanalyze)
