Add SIF Virtus models with corresponding Representable decorators
Add messages, models, representations. Specs.
Ignore some files
Rearrange directory structure to follow spec
Fix module depths
Move some SIF messages to 'common' dir.
Added the rest of the fields for StudentPersonal
Add .gitkeep files for empty dirs. Move SIS models.
Add working groups to representations. Move some objects to common dir.
More representation updates
added more infra messages
Added xml sis representable model groups.
Merge remote-tracking branch 'origin/representable' into representable

Conflicts:
	lib/sif/representations/xml/models/groups/sis/student_personal.rb
corrected sis to sif require
Added StudentPersonal class back.
Tidy up some dependencies. Use lists for requires.
Merge branch 'representable' of github.com:canadaduane/openagent into representable
Dependency heck.
Created representers for SIS general objects and Personal objects.
Merge branch 'representable' of github.com:canadaduane/openagent into representable

Conflicts:
	lib/sif/representations/xml/models/groups/sis/student_personal.rb