Not Twig 3.0.0 Compatible

[keulinho]

The project is currently not Twig 3.0.0 compatible.

The extended global \Twig_Extension class doesn't exist anymore.
To add Twig 3.0.0 support it is problably necessary to drop Twig 1 support.

[mhujer]

@keulinho See #236

[keulinho]

@florianeckerstorfer with #236 being merged dev-master is compatible with twig 3.0

is there a timeline when we can expect this being released?

[florianeckerstorfer]

@keulinho With #238 being merged this should be fine now. Release will probably happen on the weekend