Added the mass of mars.
Added diameter of mars.
Added when mars was first recorded.
Added moons file with Phobos info.
Added Jupiter's mass in new file.
Merge branch 'moons'
Added line from master
Line added from moons branch
Pulling changes from master into moons.
Added infomation on Phobos.
Merge branch 'master' of https://github.com/abouhon/planets