Fix base URL if window.location contains index.php

[valioDOTch]

I assume it was forgotten that the getBaseUrl regular expression should be adapted, after it was decided that index.html shall become index.php.

Currently I have to use a pretty ugly hack with the --body-html config

var getBaseUrl = Docs.controller.Content.prototype.getBaseUrl;
Docs.controller.Content.prototype.getBaseUrl = function(){
    var r = getBaseUrl.apply(this,arguments);
    r = r.replace('/index.php','');
    return r;
}