Change template URLs to "text" type

So they don't get validated
discussion topic on questions
added discussion topic to stub survey
example discussion_topic on the stub survey
display link to conversation using discussion_topic
Remove patch level from ruby version

So RVM switches to the latest patch
use @topic_help found from question
no longer need key in comment
removed hard-coded topic help
added note about discussion_topic to the readme
Merge pull request #700 from theodi/bugfix-dont-validate-template-urls

Change template URLs to "text" type
Merge pull request #702 from theodi/feature-update-ruby-version

Remove patchlevel from ruby version
Merge branch 'master' into survey-driven-topics
updated surveys with discussion topics
Merge branch 'survey-driven-topics' into staging