Fixed typos, added some additional comments and added a missed error check.
Added example in C.
Changed the sleep duration from 4s to 1s in the subscriber side. Removed sleep message.
Changed the sleep duration from 4s to 1s
Added example in C#
Changed send period from 4s to 1s.
Fixed README for cs and removed printed message in each pub iteration.
Removed non ASCII character from files.
Merge pull request #34 from jmlvega/master

Added C and C# examples for keyed_data_advanced example. Small fixes for keyed_data example.