refactored box2d example
Update c++challenge.rst
merging
added csparse example
added bcl and expression parser examples
Merge remote-tracking branch 'biidocs/master'
release notes
new line
1.7.1
corrected bad version
Merge remote-tracking branch 'biidocs/master'
Changed version
Back to 1.7.2
edited zmq block link
Merge pull request #116 from biicode/maria/edit

edited zmq block link
Merge remote-tracking branch 'biidocs/master'
Json11
Fix title
deleted features section; renamed other sections; added Integration section; added GTest example; fixed grammar errors; pending to update mains.bii and dependencies.bii
solved conflicts