* PHP-5.5:
  add initial install
  switch to C travis project instead of PHP
  use the generic TRAVIS environment var to check for travis (see http://docs.travis-ci.com/user/ci-environment/)

* PHP-5.5:
  make sure that we don't truncate the stack trace and cause false test failures when the test is executed in a directory with long path

* PHP-5.4:
  make sure that we don't truncate the stack trace and cause false test failures when the test is executed in a directory with long path

Conflicts:
	run-tests.php

This matches Travis and the actual return code.

This matches Travis and the actual return code.

* PHP-5.5:
  Escape non-printable characters in the junit XML output

* PHP-5.4:
  Escape non-printable characters in the junit XML output

XML doesn't allow most of the characters < 0x20 and binary output
breaks XML parsers. Such characters are not allowed as entities
either, so the generated entities are escaped in order to be printed
as text.