using new fixtures: 'change_cwd' and 'global_config_file'
added py.test --jenkins-available option
Added "Developing" section on README.md
adding travis.yaml
ensuring PYTHONPATH is configured correctly when running tests
Making requirement for simplejson explicit
Changed fixture to cleanup after itself
Adding travis build status logo to README
Update conftest.py
Merge pull request #27 from nicoddemus/issue-26-skip-jenkins-tests

Fixes issue #26: skip jenkins tests