Major refactorings before attempting to complete #20. Better separation of public and privte code. Standardized public API return convention
Fixed several issues found in static analysis. #24
Removed old callback code
Updated to new colorization by id. Removed old callback cruft
New colorization method already preserves on pan and zoom.
Simplified onMapChange, added ability to tie into map change with callback
Ability to get list of visible ids
Updated gitignore
Ready to integreate with OPQ-cloud.
Merge pull request #25 from openpowerquality/24

24