Adding WordPress versions to Travis-CI tests
Adding sample test
Attempting to fix includes for builds
Removing some older versions of WordPress from CI support

Travis-CI was setting up testing environments for WordPress versions 3.2.1 through current and master, both single and multisite. This caused a very long test execution time. If we need the others they can be added again later.
Importing tests created via old testing method
Merge branch 'master' into tests_setup