Added notes regarding version management of interpretters

Signed-off-by: Byron Sanchez <byron@hackbytes.com>
Added ruby compile-time dependencies to ruby pattern

Signed-off-by: Byron Sanchez <byron@hackbytes.com>
Added modules for installing nvm and rvm

- Added dotfiles for system user jenkins which will source nvm and rvm scripts;
  that way, nvm and rvm can be used during build runs to isolate application
  dependencies and manage versioning for different apps
- Implemented the modules in the CI node as well as the workstation node

Signed-off-by: Byron Sanchez <byron@hackbytes.com>