nroer_data_entry: PDF, Image Thumbnails creation code added
Merge branch 'mongokit' of http://github.com/gnowledge/gstudio into mongokit-explore-resources
Nroer script: try-except check added for teaches hierarchy and log_list entries converted to str
Merge branch 'mongokit' of http://github.com/gnowledge/gstudio into mongokit-explore-resources
nroer_data_entry script extra check added for teaches hierarchy
checking for last element of teaches in template
Added modified_by and correct mime_type from file obj
Merge pull request #715 from kedar2a/mongokit-explore-resources

NROER data entry script modifications.