[#2188709] mkalkbrenner: 'Retain the theme until a new theme is set' doesn't work for static/triggered rules

[#1907196] mkalkbrenner: Declare built-in client detection as deprected in favor of Browscap and Mobile Detect

[#1623078] mkalkbrenner: Add a hook to suppress themekey evaluation on special paths - added hook_themekey_disabled_paths()

mkalkbrenner: ThemeKey Redirect: added an option to evaluate the rule chain only once to optimize the performance.

mkalkbrenner: ThemeKey Redirect: Removed redirects implemented in php for authenticated users because they caused trouble with varnish. Now we always rely on javascript.

mkalkbrenner: improved ThemeKey Redirect to match more use cases, not just sub-domains for mobile devices.