use numpy for pi value instead of hard coding
Merge branch 'master' of git://github.com/newville/lmfit-py
move github references from newville to lmfit
more fixes to doc
Merge branch 'master' of https://github.com/lmfit/lmfit-py
PEP8
remove trailing whitespaces
other PEP8
Revert "use numpy for pi value instead of hard coding"

This reverts commit a7ba050ae7952039e1d6b903d3fec99776ecaff8.