Hook Profiler Bug fixes

Fixes errors when activating

First Release of Hook Profiler for WordPress

This is the profiler for WordPress plugins I always wish I had. Find out what overhead each plugin is adding to your page loads. Find out which actions are taking the most time. People said this kind of timing data wasn't possible without using PHP extensions but this proves that it is possible and very useful.

The plugin is fully functional but there's still much room for improvement. PRs are very welcome.