Imporve text contrast to be more readable

Grey text on the grey background is really hard to read.
Merge pull request #39 from majna/patch-1

Increase text contrast to be more readable
Updating Contributing.md

Signed-off-by: Adam Engebretson <adam@enge.me>
Adding #7: Opinions

Signed-off-by: Adam Engebretson <adam@enge.me>
Merge pull request #40 from adamgoose/master

Adding #7: Opinions