Removed lastActivity metrics not used and minor metrics value changes due to errors in SCM code when creating test data.
Added repositories Metrics class. Fixed minors probs.
All working for agg with Metrics classes.
negative_removed_lines removed. Not used anymore.
Added trends metrics. Removed negative_lines metrics.
Refactored to be used with Metrics classes SCM.py.
agg and time series working with Metrics classes.
General cleanup (tested with scm-analysis.py and tests).