add supporting php 5.5 ::class constant
add tests for parsing ::class constant
DCOM-243 Added check for Zend OPcache extenstion
DCOM-243 Renamed opcache extension to Zend OPcache
Merge pull request #35 from SoftRose/master

DCOM-243 Added check for Zend OPcache extenstion
Merge pull request #33 from ValeryDubrava/classname

add supporting php 5.5 ::class constant
Bumping master to `1.3.x-dev`
Adding `v1.2.0` release notes