* Added time support for --until and --since

* Add urls & hashtags normilazer

Add url in the store model
Add hastash analyser  that change all hastash to lowercase

* Remove WARNING:fake_useragent

Remove fake_useragent warning
WARNING:fake_useragent:Error occurred during loading data. Trying to use cache server https://fake-useragent.herokuapp.com/browsers/0.1.11

* Added timedelta function

* Update version

* Update setup.py

* Update README