Pydriller

Bug fixes:
- when using `include_refs` the commit now has information about remote branches as well

Features:
- support for relative paths
- git_repo available in repository mining

Remove python3.5 support.

Fix:
- error that prevented directories from being deleted when cloned in a temporary directory
- Properly handle zero-change modifications in DMM

Features:
- `pydriller.__version__`

Fix:

- fixed bug the prevented users to pass tags filters when analysing multiple repos

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

Features:
- a modified file now contains the methods that changed in the commit.

Thanks to NullConvergence for the PR!

Fix:
- fix on the log message