Using official Hamcrest repository on GitHub

1. replace usage of GoogleCode(SVN)/PEAR version of Hamcrest with official on GitHub
2. requiring Hamcrest global function definitions directly in Bootstrap
3. removing need of setting `tests` folder to include_path
4. allow to use any Hamcrest version (1.0.x or 1.1.x)
Merge pull request #170 from aik099/use-composer-hamcrest-in-tests

Change dependency to correct Hamcrest GitHub repo
Move README for consistent extension
Add CONTRIBUTING file
Add CHANGELOG
Add branch alias
Add expected date to CHANGELOG
Add UPGRADE file
Merge pull request #238 from davedevelopment/contributing

Make mockery easier to contribute to
Merge branch 'master' into parameter-object