Merged pullrequests found in jacobian's repo, #71,#74,#75

+ fix the field name restrictions layout
+ import error - "from mysite. books.models import Book" to "from books.models import Book" #75,#74
+ The settings.py file has been purposefully simplified in recent versions of Django, So TEMPLATE_DIRS dictionary is now removed from settings.py
merged pull request #70 from jacobian's repo