first commit of combiner class
Remove useless script_example files
Turn 2to3 off and make source 2 / 3 compatible
Merge pull request #48 from cdeil/no_2to3

Get rid of 2to3
Merge branch 'master' of https://github.com/astropy/ccdproc into combiner
fixed Matt's comments
add . before ccddata in combiner.py
added '.' before pytest
Merge pull request #47 from crawfordsm/combiner

Looks good, merging!