Feature: Forward compatibility with upcoming EventLoop v1.0 and v0.5 and target evenement 3.0 a long side 2.0 and 1.0 (#104 by @clue and #111 by @WyriHaximus)

Improve test suite by locking Travis distro so new defaults will not break the build and fix HHVM build for now again and ignore future HHVM build errors (#109 and #110 by @clue)

Minor documentation fixes (#103 by @christiaan and #108 by @hansott)