MIS - Course registration with type of course as a dropdown selection


**Functionalities implemented:**

1) Parsing code added for "editable" field of AttributeType instance
   - Required for a particular csv file which is used for creating AttributeType's for MIS GApp
   
   - File modified:
   
     1) management/commands/create_schema.py
     
2) Bug removed - trans block missing and unnecessary endblocktrans existing

   - Files modified:
   
     1) templates/ndf/event_create_edit.html
     2) templates/ndf/person_create_edit.html
     
3) Course registration with type of course as a dropdown selection

   - Files modified:
   
     1) gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/mis_base.html
     2) gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/mis_base_create_edit.html
     3) gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/mis_base_list.html
     4) gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/mis_create_edit.html
     5) gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/mis_details.html
     6) gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/mis_list.html
     7) gnowsys-ndf/gnowsys_ndf/ndf/views/mis.py