Merge pull request #292 from miniway/master

Java chapter 2 and chapter 3 examples
Remove deadlink to an image (README_1.png)
Replace NOBLOCK with DONTWAIT
Fix typos/formatting issues
Use zmq::proxy rather than zmq::device
Merge pull request #293 from Alexis-D/master

Fix a few typos & replace NOBLOCK by DONTWAIT in Python examples
Merge pull request #294 from jdswinbank/mtserver.cpp-fix

Use zmq::proxy rather than zmq::device
initialize queue before worker threads connects and start it in blocking mode.
Merge pull request #295 from rganz/master

C# mtserver not working
- implemented ZHelpers.SetID()
- poll 10 milliseconds not 10'000 milliseconds like in the C example (see ZMQ_POLL_MSEC in http://www.zeromq.org/docs:3-1-upgrade)
Merge pull request #296 from rganz/master

More C# examples fixed
Simplify the req/rep broker example
Merge pull request #297 from devin-c/cleaner_ruby_rrbroker

Simplify the ruby req/rep broker example
Add syncsub.go.
Make rtreq.go match the C source rtreq.c
Make rtdealer.go match C source rtdealer.c
Add example in Go lbbroker.go
Merge pull request #298 from ajanicij/master

Add and modify some examples in Go to match C sources
Revert "Fix typos/formatting issues"

This reverts commit be5aa61fdb6f4701c6d08db6a26f40cc9486fd47.
Removed double blank lines in examples