JSON keys in now a constant, and new model for extension lists.
Removed "part of" of CalendarList from the library.
Removed isStart and IsCatchAll from extension
Added version field to Dialplan
Removed failoverExtension from extension.
Bug fix. The StartingGroup wasn't read in from JSON.
Minor fix.
Extensiongroup is now an class.
Fixed bug. Accessed wrong field in factory function.
Added Comment to the root dialplan object.
Version bump.