add travis image to README.txt
Merge pull request #185 from felipecruz/feature/readme_txt_travis

add travis image to README.txt
Merge pull request #186 from hintjens/master

Working on zcurve
Merge pull request #188 from hintjens/master

Removing zcurve from CZMQ
Added support for ztree

Ordered container class based on red-black tree.
Based on libredblack:
  http://libredblack.sourceforge.net/
Merge pull request #189 from shemminger/master

Add ztree class to CZMQ
Whitespace and formatting fixes