Add support for JRuby

[sferik]

I'd like to reopen issue #65.

With the latest version of JRuby, it is possible to install Typhoeus, but it's failing with the error

NameError: undefined method `queue' for class `Typhoeus::Hydra'

Here's a link to the full trace: http://travis-ci.org/#!/technoweenie/faraday/jobs/455588

I had to disable tests for Typhoeus in Faraday to make them pass on JRuby: technoweenie/faraday@fea22ff.

It would be nice if we could get this working.

/cc @headius @enebo @BanzaiMan @nahi @technoweenie @mislav

[nahi]

Hmm, 'bundle exec rake' runs fine for me, both JRuby master and JRuby 1.6.5. Can you try to point what testcase fails at CI?

[freerobby]

We're seeing problems with Typhoeus on JRuby 1.6.7, using Torquebox/JBoss. Stack trace on app startup indicates it's a problem with native extensions.

18:16:20,580 ERROR org.torquebox.core.runtime Error during execution: ENV['RAILS_ROOT']=RACK_ROOT
ENV['RAILS_ENV']=RACK_ENV
require %q(org/torquebox/web/rails/boot)
: org.jruby.exceptions.RaiseException: (LoadError) load error: typhoeus/native -- java.lang.UnsatisfiedLinkError: dlopen(/Users/robby/.rvm/gems/jruby-1.6.7@shareaholic_on_rails/gems/typhoeus-0.3.3/ext/typhoeus/native.bundle, 9): no suitable image found. Did find:
/Users/robby/.rvm/gems/jruby-1.6.7@shareaholic_on_rails/gems/typhoeus-0.3.3/ext/typhoeus/native.bundle: mach-o, but wrong architecture
at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1042) [jruby.jar:]

[hanshasselberg]

I think the ffi integration should do it. I'll enable travis for jruby.