add Visual Studio 2010 solution and projects for C++ hello world
Merge pull request #314 from damian123/master

Visual Studio 2010 solution and projects
Update Go examples for new gozmq API.
Merge pull request #315 from jtacoma/gozmqfix

Update Go examples for new gozmq API.
chapater4 java freelance pattern
Merge pull request #317 from miniway/master

chapter4 java freelance pattern
Fixed else syntax error
Merge pull request #318 from amree/fix-cpp-example

Fixed C++ example syntax error
chapter5 java last value caching
Merge pull request #319 from miniway/master

chapter5 java last value caching
chapter5 first part of java clone examples
Update Go examples to use socket option methods.
Merge pull request #321 from miniway/master

chapter5 first part of java clone examples
Merge pull request #322 from jtacoma/gozmq-sockopts

Update Go examples to use socket option methods.