skinny 1.3.4 (new formula)

 Skinny is a full-stack web app framework built on Scalatra.

 http://skinny-framework.org/

 Review: inline the version into the URL https://github.com/Homebrew/homebrew/pull/33309/files#r19055353
 Review: Needs to check npm is installed; could be built without-npm
 Review: Use double-quotes everywhere
 Review: Also system "split", "like", "this", "please"
 Review: Seems like we should install to the libexec and write a wrapper script.
 Review: Needs to check npm is installed; could be built without-npm
 Review: Remove empty line.
 Review: Can a test be added to do something more substantial than e.g. --version or --help?
 Review: Should probably be called without-npm-generator?
 Review: Just use libexec below rather than creating another variable.
 Review: this should be done with a Requirement, I should have been clearer earlier.