added a couple of implementations using lists instead of Numeric arrays.  They are very slow.
added a couple of implementations using lists instead of Numeric arrays.  They are very slow.

jschueller/numpy,rhythmsosad/numpy,felipebetancur/numpy,KaelChen/numpy,seberg/numpy,astrofrog/numpy,AustereCuriosity/numpy,WillieMaddox/numpy,andsor/numpy,mattip/numpy,SunghanKim/numpy,moreati/numpy,madphysicist/numpy,gfyoung/numpy,ekalosak/numpy,pdebuyl/numpy,ESSS/numpy,Eric89GXL/numpy,brandon-rhodes/numpy,matthew-brett/numpy,rajathkumarmp/numpy,matthew-brett/numpy,ewmoore/numpy,tynn/numpy,joferkington/numpy,bringingheavendown/numpy,pelson/numpy,ajdawson/numpy,drasmuss/numpy,jorisvandenbossche/numpy,shoyer/numpy,dwf/numpy,endolith/numpy,grlee77/numpy,ahaldane/numpy,ekalosak/numpy,dwf/numpy,maniteja123/numpy,kiwifb/numpy,dimasad/numpy,jorisvandenbossche/numpy,mingwpy/numpy,jakirkham/numpy,simongibbons/numpy,jakirkham/numpy,simongibbons/numpy,CMartelLML/numpy,solarjoe/numpy,rudimeier/numpy,WarrenWeckesser/numpy,grlee77/numpy,pbrod/numpy,cjermain/numpy,gmcastil/numpy,yiakwy/numpy,mattip/numpy,naritta/numpy,dato-code/numpy,jonathanunderwood/numpy,dwf/numpy,tynn/numpy,Linkid/numpy,dwf/numpy,skwbc/numpy,astrofrog/numpy,rajathkumarmp/numpy,KaelChen/numpy,ddasilva/numpy,ContinuumIO/numpy,has2k1/numpy,kiwifb/numpy,ChanderG/numpy,rajathkumarmp/numpy,mathdd/numpy,SiccarPoint/numpy,brandon-rhodes/numpy,tdsmith/numpy,pbrod/numpy,immerrr/numpy,githubmlai/numpy,rudimeier/numpy,rmcgibbo/numpy,pyparallel/numpy,rgommers/numpy,rmcgibbo/numpy,leifdenby/numpy,GaZ3ll3/numpy,felipebetancur/numpy,skymanaditya1/numpy,ViralLeadership/numpy,solarjoe/numpy,simongibbons/numpy,dwillmer/numpy,ekalosak/numpy,rgommers/numpy,b-carter/numpy,rudimeier/numpy,sonnyhu/numpy,WarrenWeckesser/numpy,charris/numpy,abalkin/numpy,bmorris3/numpy,mathdd/numpy,ESSS/numpy,ewmoore/numpy,sigma-random/numpy,dwillmer/numpy,Yusa95/numpy,MichaelAquilina/numpy,ContinuumIO/numpy,SunghanKim/numpy,seberg/numpy,trankmichael/numpy,cjermain/numpy,GrimDerp/numpy,sinhrks/numpy,larsmans/numpy,KaelChen/numpy,utke1/numpy,gfyoung/numpy,numpy/numpy,kirillzhuravlev/numpy,MichaelAquilina/numpy,ViralLeadership/numpy,gmcastil/numpy,MichaelAquilina/numpy,simongibbons/numpy,kiwifb/numpy,felipebetancur/numpy,maniteja123/numpy,andsor/numpy,rhythmsosad/numpy,dch312/numpy,NextThought/pypy-numpy,dch312/numpy,sinhrks/numpy,MaPePeR/numpy,maniteja123/numpy,anntzer/numpy,BabeNovelty/numpy,larsmans/numpy,githubmlai/numpy,Linkid/numpy,pbrod/numpy,ewmoore/numpy,anntzer/numpy,rherault-insa/numpy,njase/numpy,mathdd/numpy,grlee77/numpy,SiccarPoint/numpy,shoyer/numpy,jankoslavic/numpy,njase/numpy,sonnyhu/numpy,numpy/numpy-refactor,GrimDerp/numpy,immerrr/numpy,MSeifert04/numpy,moreati/numpy,rgommers/numpy,jankoslavic/numpy,githubmlai/numpy,numpy/numpy-refactor,charris/numpy,has2k1/numpy,felipebetancur/numpy,dimasad/numpy,empeeu/numpy,kirillzhuravlev/numpy,drasmuss/numpy,pyparallel/numpy,gmcastil/numpy,GrimDerp/numpy,ssanderson/numpy,cjermain/numpy,cowlicks/numpy,ChristopherHogan/numpy,rherault-insa/numpy,MaPePeR/numpy,cowlicks/numpy,ahaldane/numpy,AustereCuriosity/numpy,mindw/numpy,rmcgibbo/numpy,stefanv/numpy,ogrisel/numpy,abalkin/numpy,larsmans/numpy,grlee77/numpy,mindw/numpy,mingwpy/numpy,hainm/numpy,sinhrks/numpy,MichaelAquilina/numpy,joferkington/numpy,yiakwy/numpy,WarrenWeckesser/numpy,CMartelLML/numpy,ChristopherHogan/numpy,mathdd/numpy,naritta/numpy,ChanderG/numpy,empeeu/numpy,dato-code/numpy,BabeNovelty/numpy,trankmichael/numpy,jschueller/numpy,Yusa95/numpy,yiakwy/numpy,sigma-random/numpy,ssanderson/numpy,nguyentu1602/numpy,leifdenby/numpy,BabeNovelty/numpy,numpy/numpy,ekalosak/numpy,seberg/numpy,seberg/numpy,behzadnouri/numpy,Anwesh43/numpy,stefanv/numpy,hainm/numpy,pdebuyl/numpy,dwillmer/numpy,nguyentu1602/numpy,chatcannon/numpy,astrofrog/numpy,has2k1/numpy,BMJHayward/numpy,brandon-rhodes/numpy,Linkid/numpy,drasmuss/numpy,stuarteberg/numpy,Srisai85/numpy,WarrenWeckesser/numpy,Dapid/numpy,brandon-rhodes/numpy,Srisai85/numpy,mingwpy/numpy,pbrod/numpy,GaZ3ll3/numpy,chiffa/numpy,ogrisel/numpy,bmorris3/numpy,tacaswell/numpy,CMartelLML/numpy,pelson/numpy,SiccarPoint/numpy,Yusa95/numpy,ajdawson/numpy,ahaldane/numpy,NextThought/pypy-numpy,b-carter/numpy,GaZ3ll3/numpy,GaZ3ll3/numpy,shoyer/numpy,MSeifert04/numpy,Anwesh43/numpy,numpy/numpy-refactor,groutr/numpy,Linkid/numpy,chiffa/numpy,bringingheavendown/numpy,yiakwy/numpy,mortada/numpy,ahaldane/numpy,pizzathief/numpy,astrofrog/numpy,behzadnouri/numpy,cowlicks/numpy,ahaldane/numpy,musically-ut/numpy,jorisvandenbossche/numpy,Anwesh43/numpy,Anwesh43/numpy,naritta/numpy,chatcannon/numpy,sonnyhu/numpy,rudimeier/numpy,KaelChen/numpy,NextThought/pypy-numpy,dwillmer/numpy,WarrenWeckesser/numpy,rhythmsosad/numpy,jorisvandenbossche/numpy,nbeaver/numpy,pbrod/numpy,utke1/numpy,ChanderG/numpy,utke1/numpy,charris/numpy,numpy/numpy,trankmichael/numpy,Dapid/numpy,sigma-random/numpy,chatcannon/numpy,CMartelLML/numpy,mortada/numpy,dimasad/numpy,rherault-insa/numpy,ddasilva/numpy,tdsmith/numpy,dwf/numpy,jakirkham/numpy,ogrisel/numpy,jschueller/numpy,hainm/numpy,shoyer/numpy,embray/numpy,pelson/numpy,Eric89GXL/numpy,ajdawson/numpy,andsor/numpy,SunghanKim/numpy,cjermain/numpy,mattip/numpy,pizzathief/numpy,groutr/numpy,MSeifert04/numpy,joferkington/numpy,nbeaver/numpy,tdsmith/numpy,bmorris3/numpy,astrofrog/numpy,joferkington/numpy,BMJHayward/numpy,stuarteberg/numpy,mingwpy/numpy,ewmoore/numpy,Yusa95/numpy,mhvk/numpy,mhvk/numpy,MaPePeR/numpy,mhvk/numpy,jonathanunderwood/numpy,ewmoore/numpy,kirillzhuravlev/numpy,madphysicist/numpy,embray/numpy,immerrr/numpy,musically-ut/numpy,tacaswell/numpy,anntzer/numpy,nguyentu1602/numpy,MSeifert04/numpy,skwbc/numpy,solarjoe/numpy,mwiebe/numpy,dch312/numpy,jakirkham/numpy,SiccarPoint/numpy,matthew-brett/numpy,musically-ut/numpy,dato-code/numpy,ChristopherHogan/numpy,empeeu/numpy,jankoslavic/numpy,endolith/numpy,matthew-brett/numpy,charris/numpy,pdebuyl/numpy,MaPePeR/numpy,Dapid/numpy,tacaswell/numpy,stefanv/numpy,skwbc/numpy,ajdawson/numpy,b-carter/numpy,moreati/numpy,mhvk/numpy,jschueller/numpy,rgommers/numpy,BMJHayward/numpy,ssanderson/numpy,mindw/numpy,skymanaditya1/numpy,kirillzhuravlev/numpy,hainm/numpy,endolith/numpy,larsmans/numpy,anntzer/numpy,NextThought/pypy-numpy,ogrisel/numpy,musically-ut/numpy,numpy/numpy-refactor,mwiebe/numpy,rajathkumarmp/numpy,madphysicist/numpy,gfyoung/numpy,groutr/numpy,jonathanunderwood/numpy,embray/numpy,stuarteberg/numpy,sinhrks/numpy,stuarteberg/numpy,SunghanKim/numpy,dimasad/numpy,jorisvandenbossche/numpy,jankoslavic/numpy,pelson/numpy,naritta/numpy,nbeaver/numpy,skymanaditya1/numpy,Eric89GXL/numpy,madphysicist/numpy,shoyer/numpy,pdebuyl/numpy,Srisai85/numpy,nguyentu1602/numpy,bringingheavendown/numpy,tdsmith/numpy,stefanv/numpy,MSeifert04/numpy,chiffa/numpy,BabeNovelty/numpy,mwiebe/numpy,ESSS/numpy,BMJHayward/numpy,sonnyhu/numpy,pizzathief/numpy,mhvk/numpy,AustereCuriosity/numpy,WillieMaddox/numpy,skymanaditya1/numpy,matthew-brett/numpy,simongibbons/numpy,ogrisel/numpy,githubmlai/numpy,pizzathief/numpy,abalkin/numpy,trankmichael/numpy,ContinuumIO/numpy,empeeu/numpy,argriffing/numpy,Eric89GXL/numpy,rmcgibbo/numpy,pyparallel/numpy,embray/numpy,pelson/numpy,mindw/numpy,bertrand-l/numpy,ViralLeadership/numpy,tynn/numpy,pizzathief/numpy,bmorris3/numpy,njase/numpy,sigma-random/numpy,stefanv/numpy,GrimDerp/numpy,has2k1/numpy,endolith/numpy,dch312/numpy,leifdenby/numpy,behzadnouri/numpy,mortada/numpy,Srisai85/numpy,numpy/numpy,mattip/numpy,andsor/numpy,dato-code/numpy,rhythmsosad/numpy,mortada/numpy,grlee77/numpy,bertrand-l/numpy,ChanderG/numpy,madphysicist/numpy,argriffing/numpy,ddasilva/numpy,numpy/numpy-refactor,ChristopherHogan/numpy,jakirkham/numpy,bertrand-l/numpy,argriffing/numpy,WillieMaddox/numpy,cowlicks/numpy,embray/numpy,immerrr/numpy