Fixing support for windows 8. Adding support to internet explorer 11. Fixing regular expressions to adapt IE11. Adding support for Windows touchscreen desktop pcs.
Use HTTP 302 for redirect as IE permanently caches HTTP 301
Make middleware thread-safe, closes #68

The thread-safety issue manifested itself as two separate requests
receiving the same environment further down the middleware chain. As
a result, two different URLs could yield the exact same response.
Merge branch 'feature/ie11_detection' of https://github.com/ronald05arias/browser
Merge commit '8bfd3a1b998dc94cf6beaed7bbdbdb9d231d9318' of https://github.com/cjse/browser
fix loading of test_helper so we can run rake test
fix conflicts when merging pull requests #66 (conflict was with changes made by pull #69).