refactor http method enum out
refactor init methods so they pass the appropriate tag, removed value from element with value init
reorder files
Merge branch 'implement-factory'

Conflicts:
	INDObjCTwiMLWriter/models/INDTwiMLConferenceElement.m
	INDObjCTwiMLWriter/models/INDTwiMLDialElement.m
	INDObjCTwiMLWriter/models/INDTwiMLNestedDialElement.m