Dr. Heapstat plugin and naming

Fixes #8
 * Turns off sorting while modifying data to avoid index mis-matches
tree view now sorts data for entire snapshot, not just one callstack
removed un-needed tool_base
Click on line-number in tree view to open source-file
hide first snapshot option is now hide peak snapshot
Fixes #9
Adds staleness bar graph
Changes qDebug message to use __CLASS__ and __FUNCTION__

Changes naming convention for entire project