Re #64, verify php version in index.php before doing anything else. This should prevent people from trying to run on outdated php versions.
Also check for bcmath
Merge pull request #66 from kormoc/issue-64

Re #64, verify php version in index.php before doing anything else. This...
changes to better support performance schema datasource

+ added group by digest to default perf_schema report
+ cleaned up numerous warnings
+ created show_query page for perf_schema