Setting up the ability to do multiple rewrites and conditions.

Depricating old rewrite_rule declaration in favour of a new rewrite declaration
Adds ability to inject comments directly above rewrite directives
Adds ability to define multiple rewrite rules
Adds ability to define multiple rewrite conditions on a rule set
Merge pull request #517 from amvapor/rewrites_multiple

Setting up the ability to do multiple rewrites and conditions. Allowing ...