Generate Thrift Request Handler Definitions Automatically

[willsalz]

Why

It's kind-of-the whole point of Thrift Services.

How

• Thrift IDL parsing via Facebook Swift
• RequestHandler code generation via Mustache.java

cc @truncs

[willsalz]

I already have a sample project that's able to parse arbitrary Thrift IDL files and fill out some basic tempting e.g. Service Names, Method arguments, etc.