Add coding standards.

Signed-off-by: Norv <a.w.norv@gmail.com>
Add architecture documentation.

Signed-off-by: Norv <a.w.norv@gmail.com>
Fix contributing format.

Signed-off-by: Norv <a.w.norv@gmail.com>
Merge pull request #120 from norv/contributing_update

Contributing update