Attempt to fix Travis configuration
Install phing for Travis
Avoid compiling PECLs
Refresh PHP environment after install phing
Add missing pio_ prefix to inactive parameter
Fix test
Merge pull request #10 from kamisama/develop

Add missing pio_ prefix to inactive parameter
Add code coverage
Merge branch 'develop' of github.com:PredictionIO/PredictionIO-PHP-SDK into develop