1.13

Features:

• new parameter order, that can accept "date-order", "author-date-order", "topo-order" and "reverse"
• process metrics can now accept dates

Deprecated:

• "reversed_order": now the user should use order='reverse'

Bug fix:

• fix on ordering of the commits, that was a bit different from what Git was presenting in reality. We now use git filters to order the commits.
• fix on "from_commit" and "to_commit" if they had the same commit date