Fixed callable collumn test

the test was sending a list instead of a function
Merge pull request #113 from dec0dedab0de/master

Fixed callable column test
CORE CONTRIBUTORS

:cake: @iurisilvio
v0.10.0
WHEELS
3.3, 3.4
.org
Merge branch 'develop'
makefile for WHEELS
v0.10.0 history
ALL
Separate py2 and py3 packages to avoid installation errors. Fix #151
Running travis and tox with python 3.4.
Merging upstream develop branch into dbf-support branch.