location field's data-type changed from 'dict' to '[dict]'
Updates location fields' value from '{}' to '[]'
Updates location fields' values from '{}' to '[]'; and Renames field - 'modified_by' to 'contributors'
Adding 'modified_by' field with None as it's default value
Renamed 'modified_by' to 'contributors'; and Added new modified_by field (data-type: int)
user_details_dict property modified: Changed modified_by to contributors; and While updating history (version-file), now it stores username of the specific user who modifies the document.
Code added to save modified_by and contributors.
Modifications regarding resolving following error: Can't concatenate 'int' to 'str'...
Merge branch 'mongokit' of https://github.com/AvadootNachankar/gstudio into mongokit-dev
Changed key from modified_by to contributors and added new key as modified_by
Replaced modified_by by contributors
Code added/modified to save modified_by and contributors fields accordingly
Merge branch 'mongokit' of https://github.com/AvadootNachankar/gstudio into mongokit
Merge branch 'mongokit-dev' into mongokit
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit
Merge pull request #311 from AvadootNachankar/mongokit

Models file updated: Replaced field-name modified_by by contributors ([int]) and new modified_by (int) field added
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit