Don't rely on ruby-install to install ruby dependencies.
Remove some hardcoded ruby-install version information
Remove hardcoded ruby 2.0.0 patch level for PATH
Add note about using --update to avoid hardcoding the ruby patchlevel
Disable building of documentation and enable libruby.so
Single line echoing into files and add no-document option to gemrc
Use newer bundler for the concurrent gem install option
Disable qpid for now

[skip ci]