[#862]: Replace slashes for path with DIRECTORY_SEPARATOR

I suspect that the issue mentioned in #682 comes from the routing. The routing
uses '/' instead of directory separator and it would seem that this is not
translated to the OS' specific separator.

By replacing the '/' with DIRECTORY_SEPARATOR I hope it will solve the issue.
Tanslate function expects second parameter to be an array. String given.
Merge pull request #879 from stefangr/bugfix_parser

Bugfix for: PHP Warning:  vsprintf() expects parameter 2 to be array, string given
[#875]: Generate root namespace as \ and not global
Merge pull request #882 from mvriel/875

[#875]: Generate root namespace as \ and not global
[#875]: Append changelog
[874]: Inject version number with @version into template
Merge pull request #883 from mvriel/874

[874]: Inject version number with @version into template
Merge branch 'develop' of github.com:phpDocumentor/phpDocumentor2 into develop
Fix a fatal error when a parent interface could not be resolved
Add InterfaceDescriptor and children to linker
Methods should not be interpreted as functions
If the visibility is not set it should be interpreted as public
Inheritance was not fully implemented; class and interface is expanded
Show existing typehint with arguments if no @param tag is present
Fix fatal error when interface extends another
Merge branch '874' into release-2.0
Committing changelog
Updating responsive-twig template
Bump version