only turn rewrite on once
Checking if server_aliases is defined in example
Correct mod_basic/digest recipe names in README

* `mod_basic` is `mod_auth_basic`
* `mod_digest` is `mod_auth_digest`
Merge pull request #156 from Odaeus/patch-1

Correct mod_basic/digest recipe names in README
Added notification hook for gitter.im
Added Gitter Chat badge to README
Merge pull request #106 from kriswallsmith/patch-1

only turn rewrite on once
Merge pull request #152 from fejese/master

Checking if server_aliases is defined in example
merging from master