updates to pccTables.pl
lots of upgrades to pccTables.pl, which is renamed to niceTables.pl, and pccTables.pl now redirects there
tidying things for develop branch
moved pccTables.pl to OPL/PCC/macros
Merge pull request #157 from Alex-Jordan/pccTables

Pcc tables

I tested all of the options described in the comment documentation in the macro file.  (Alex's test problem was helpful here.)  Everything seemed to work as advertised.