Skip overriding start_time and end_time attribut-type's subject_type field as it already has value set by filldb.py.
Merge pull request #772 from sunnychaudhari/collection

Now images can be navigated using image gallary with Lightbox
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit
start_time & end_time: data_type value changed from 'DATA_TYPE_CHOICES[9]' to 'datetime.datetime'
course_create_edit() created: Code added only for displaying widgets; and for saving part not implemented yet
import added for including course-view details
Templates created/updated for 'Announced Course' & 'NUSSD Course' implementation.
Merge pull request #773 from AvadootNachankar/mongokit

MIS Updates: 'Announced Course' Registration Implementation
resource categories are added for Browse Resources
queries added for fetching the different categories of resources in Browse Resource