ros/xacro — pull request #24 by guihomework (2014-03-14 14:13:16+00:00)
Title: backported if statements from hydro-devel 

If statement support are really interesting and worth sharing with users constrained to stick to groovy for some more time.

backported if statements from hydro-devel and improved float evaluation for unless also.
backported logic statements test including unless.