enable hhvm-nightly on Travis CI
update tests and some edge cases for HHVM
remove HHVM from allowed failures and enable travis for PHP 5.6
UTF-8 file system acces for Windows from https://gist.github.com/nicolas-grekas/2665437
remove some short path usages thanks to https://gist.github.com/nicolas-grekas/2665437#comment-819898
refactor WinFs as a stream wrapper
tests and fixes for WinFS stream wrapper
unit tested recursive mkdir for WinFS stream wrapper
fix
some more tests
fix by converting getcwd() to UTF-8
mention php-wfio
update travis badge