minor #1638 added PHP 7 nightly to the test matrix and HHVM nightly (fabpot)
minor #1638 added PHP 7 nightly to the test matrix and HHVM nightly (fabpot)

This PR was merged into the 1.18-dev branch.

Discussion
----------

added PHP 7 nightly to the test matrix and HHVM nightly

Commits
-------

a1295e9 added PHP 7 nightly to the test matrix and HHVM nightly

znerol/Twig,framewr/Twig,nicolas-grekas/Twig,craue/Twig,twigphp/Twig,gamernetwork/Twig,fsw/Twig,iKwinto/Twig,gamernetwork/Twig,hhamon/Twig,framewr/Twig,derickr/Twig,Rvanlaak/Twig,dkarvounaris/Twig,dkarvounaris/Twig,hason/Twig,fsw/Twig,hason/Twig,jamessingizi/Twig,gencer/Twig,iKwinto/Twig,craue/Twig,moufmouf/Twig,apishka/templater,framewr/Twig,moltin/Twig,robregonm/Twig,Tobion/Twig,robregonm/Twig,moufmouf/Twig,nicolas-grekas/Twig,twigphp/Twig,loi-chuanoi/Twig,dkarvounaris/Twig,huang53798584/Twig,hason/Twig,apishka/templater,bocharsky-bw/Twig,moltin/Twig,jamessingizi/Twig,hhamon/Twig,Rvanlaak/Twig,derickr/Twig,huang53798584/Twig,gencer/Twig,nicolas-grekas/Twig,robregonm/Twig,Rvanlaak/Twig,nicolas-grekas/Twig,moltin/Twig,znerol/Twig,huang53798584/Twig,nicolas-grekas/Twig,twigphp/Twig,hhamon/Twig,bocharsky-bw/Twig,iKwinto/Twig,znerol/Twig,gamernetwork/Twig,fsw/Twig,bocharsky-bw/Twig,derickr/Twig,moufmouf/Twig,Tobion/Twig,jamessingizi/Twig,Tobion/Twig