Update README.rst

Some update to Contribute guide.
Update README.rst
Update README.rst
Python 3 compatibility fix
Whitespace fix
Merge pull request #31 from melvyn-sopacua/master

Python3 compatibility fix
update datetimepicker to the last version and now works with Bootstrap version 2 and 3 FIX #20
new DateWidget and TimeWidget CLOSE #20 #16 #17 FIX #24
update package version and README
add dateTimeExample django project
redirect to default page in example
merge with master branch
update topic for pypi