Removed no longer used test setup file.

This script was originally part of the older travis-ci scripts and was
used to initiate certain php extensions. Those extensions are already
present on travis-ci now, and the php.ini loader functionality makes
this obsolete.
Cleaned up format of composer warning
Updated travis configuration to include 5.5 testing.
Removed conditional 5.5 support- failures will make the builds fail now.

Guess this means we support php5.5 now :-)
Moved Travis-CI specific files into their own folder.
Merge pull request #87 from tedivm/housekeeping

Housekeeping