Include prerequisites.
Merge pull request #438 from rackerlabs/ruby-prerequisites

Include prerequisites on the Ruby SDK page.
Open all links in the same window.
Removing CoC link field until legalese is sorted out.
Merge pull request #448 from ycombinator/gh-446

Removing CoC link field until legalese is sorted out
Merge pull request #447 from ycombinator/gh-412

Open all links in the same window
Zapping Line numbers from codeblocks
commented code deletion
Merge pull request #450 from rdodev/line-number-disintegrator

Zapping Line numbers from codeblocks