Added psr-4 autoload configuration and flattened directories.
Added example test case using trait.

Modified travis config to not run that test if not 5.4.
Remove tab characters from travis yml.
Fixed bash command.
Check travis php version.
Trying a different variable check.
Explicitly defined test file for 5.3 under examples.
Merge pull request #2 from zumba/psr4

Implemented PSR-4 support and added trait test coverage.