repoman/main.py: Split out vcsstatus.py with VCSStatus class

This class scans the vcs to determine ebuilds not added.
Repoman: Create a new QATracker class

Make use of the new QATracker class to track all fails.
Use the length of each tracker for stats count.
Only store trackers if they occurred.
QATracker roughed in for tracking warnings as well as errors.