add gdict.py to operator/tools/
fix typo
clarify comment
fix legacy network remap
better notes for pre-defined values (ts, date, date_ts)
Merge pull request #16 from stephen-soltesz/plsync-remap-fix

fix legacy network remap
Merge pull request #14 from stephen-soltesz/add-gdict

Add gdict.py to operator/tools
Merge branch 'master', remote-tracking branch 'upstream/master'