Merge branch 'release/0.3.0' into develop
Housekeeping.
Removed usage of icecave/collections.
Removed typhoon.
PHP 5.3 compatibility fix.
Trying HHVM build on Travis CI, for science.
Revert "Trying HHVM build on Travis CI, for science."

This reverts commit af2a5766ed3cecd704c5e70841b0f3bb3bf802dc.

Archer would need explicit support for HHVM as it does not support the same
command line options as PHP.
Updated badges.
Housekeeping.
Updated badge URLs.
Updated to PSR-4.
Merge pull request #7 from koden-km/feature/use-psr4

Updated to PSR-4.
Bumped version and updated changelog.
Merge branch 'release/0.4.0'