- support test with tox
- adjust travis.yml for working with newer versions of python
- add MANUFEST.in
adjusting CHANGES.txt
set correct version of package
remove unused includes
readding a deleted line space
rename testing compat module
use directly martians test suite
add global module for python compatibility
return __str__ output of exception and reraise it as GrokError
remove check of func_code and just get attribute of  "__code__"
simplify code