contact.rst: fix spelling errors
contributing.rst: reword coding style description
Merge pull request #8 from larsbutler/typos-and-wording

Typo fixes and rephrasing
restructuing documentation
more restructuring of docs
split zebra documentation into multiple smaller pages
replaced TODOs with short but complete descriptions
Merge pull request #9 from byeager/master

replaced TODOs with short but complete descriptions