Issue #2373821 by paulbeaney, mkalkbrenner: differentiate between scalar and complex get and cookie values

Issue #2224913 by mkalkbrenner: removed single quotes from module descriptions in info files which seemed to cause issues in some environments.

Issue #2277243 by mkalkbrenner: fixed Call to undefined function themekey_invoke_modules() in themekey_ui.module on line 304

[#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.