Updated requirements and converted HACKING to rst
Updated requirements and converted HACKING to rst

Conflicts:
	requirements.txt

ozialien/python-skyfield,exoanalytic/python-skyfield,exoanalytic/python-skyfield,GuidoBR/python-skyfield,GuidoBR/python-skyfield,skyfielders/python-skyfield,ozialien/python-skyfield,skyfielders/python-skyfield