explain the team and contributors structure
team members in boxes instead of rows
add larry and jessica to core team list
put highest versions at the top of compatibility
link to compatibility in the sidebar
add code of conduct
add thanks and license to conduct
use rubygems.org instead of :gemcutter
fix example output to represent actual output
Merge pull request #100 from krisleech/fix-source-in-example

use rubygems.org instead of :gemcutter
Fix old link (v1.3 -> v1.5)
Merge pull request #101 from marocchino/fix-old-link

Fix old link (v1.3 -> v1.5)