Added CourseCatalog object + basic CR operations + upload Catalog Seed File
Parser is now creating courses from xgml file
Replaced Catalog model's nasty if by nice regex
Removed Commented code
Nested modules, courses and programs to catalog
Updated program crud operations
Added PModule CRUD actions
Updated Course's CRUD action (to match new nesting)
Added some info into catalog's index view
Added destroy action into catalog controller
Added some links into catalog views
Added some navigation links into course & p_module views
Updated CourseEntity's CRUD action (and views) (to match new nesting)
Parser is now parsing modules, programs & courses git add .
Updated .gitignore to ignore uploaded xml files
updated gitignore file
Changed catalog seeds directory