Remove any hard-coded site name/link from the templates

[sneetsher]

Alfanous is an open-source project for anyone, it's code should be generic that anyone can easily run his own copy.

Some Django templates of WUI contain hard-coded links to www.alfanous.org . We should get rid of them and use the variable instead.

[assem-ch]

For me, the web UI is just a showcase, the product is the search library with its API ... so I prefere not to focus on this unlees we intend to make a generic Django app for search in Quran

[sneetsher]

@assem-ch No high priority but it will allow us to host a development for testing before production deployment.

The current state does not stop us from doing so, but we will not be able to test all broken links.