Fix CS
Bump requirement to php5.4
Make use of 5.4 $this support
greatly improve performance of buildFixtures
Merge pull request #161 from bendavies/array_merge_perf

greatly improve performance of buildFixtures
Fix a few typos and improve readability for README.md
Merge pull request #163 from ifdattic/fix-readme

Fix a few typos and improve readability for README.md
Allow PHP fixtures to include files as well