DOC: Added understanding code and getting started section to development_environment.rst
DOC: Added understanding code and getting started section to development_environment.rst

Updated understanding code section in dev doc
wrapped lines, corrected grammar.

b-carter/numpy,simongibbons/numpy,pdebuyl/numpy,shoyer/numpy,madphysicist/numpy,WarrenWeckesser/numpy,madphysicist/numpy,ahaldane/numpy,anntzer/numpy,mhvk/numpy,bertrand-l/numpy,ContinuumIO/numpy,charris/numpy,pizzathief/numpy,pizzathief/numpy,numpy/numpy,AustereCuriosity/numpy,rgommers/numpy,SiccarPoint/numpy,ddasilva/numpy,endolith/numpy,kiwifb/numpy,SiccarPoint/numpy,gmcastil/numpy,solarjoe/numpy,mhvk/numpy,madphysicist/numpy,joferkington/numpy,endolith/numpy,jorisvandenbossche/numpy,seberg/numpy,chatcannon/numpy,madphysicist/numpy,jorisvandenbossche/numpy,stuarteberg/numpy,rgommers/numpy,pdebuyl/numpy,charris/numpy,AustereCuriosity/numpy,simongibbons/numpy,bringingheavendown/numpy,skwbc/numpy,maniteja123/numpy,rgommers/numpy,b-carter/numpy,ssanderson/numpy,mattip/numpy,kiwifb/numpy,b-carter/numpy,charris/numpy,kiwifb/numpy,anntzer/numpy,tynn/numpy,numpy/numpy,WarrenWeckesser/numpy,pbrod/numpy,WarrenWeckesser/numpy,endolith/numpy,argriffing/numpy,rherault-insa/numpy,pizzathief/numpy,jakirkham/numpy,argriffing/numpy,chatcannon/numpy,dwillmer/numpy,charris/numpy,MSeifert04/numpy,mattip/numpy,stuarteberg/numpy,skwbc/numpy,madphysicist/numpy,pbrod/numpy,WarrenWeckesser/numpy,grlee77/numpy,MSeifert04/numpy,utke1/numpy,maniteja123/numpy,numpy/numpy,gfyoung/numpy,jakirkham/numpy,behzadnouri/numpy,drasmuss/numpy,rgommers/numpy,maniteja123/numpy,solarjoe/numpy,jorisvandenbossche/numpy,simongibbons/numpy,abalkin/numpy,bringingheavendown/numpy,skwbc/numpy,simongibbons/numpy,solarjoe/numpy,behzadnouri/numpy,abalkin/numpy,ddasilva/numpy,utke1/numpy,dwillmer/numpy,pdebuyl/numpy,gmcastil/numpy,WarrenWeckesser/numpy,behzadnouri/numpy,Eric89GXL/numpy,grlee77/numpy,seberg/numpy,gfyoung/numpy,ContinuumIO/numpy,rherault-insa/numpy,shoyer/numpy,drasmuss/numpy,pbrod/numpy,tacaswell/numpy,endolith/numpy,mattip/numpy,grlee77/numpy,rherault-insa/numpy,gmcastil/numpy,utke1/numpy,joferkington/numpy,tynn/numpy,numpy/numpy,tacaswell/numpy,jorisvandenbossche/numpy,jakirkham/numpy,SiccarPoint/numpy,ahaldane/numpy,jorisvandenbossche/numpy,dwillmer/numpy,AustereCuriosity/numpy,njase/numpy,ssanderson/numpy,mhvk/numpy,njase/numpy,ContinuumIO/numpy,stuarteberg/numpy,chiffa/numpy,anntzer/numpy,chatcannon/numpy,shoyer/numpy,shoyer/numpy,joferkington/numpy,mhvk/numpy,dwillmer/numpy,tacaswell/numpy,drasmuss/numpy,argriffing/numpy,stuarteberg/numpy,jakirkham/numpy,ssanderson/numpy,pdebuyl/numpy,seberg/numpy,gfyoung/numpy,abalkin/numpy,pizzathief/numpy,ahaldane/numpy,bringingheavendown/numpy,Eric89GXL/numpy,Eric89GXL/numpy,grlee77/numpy,njase/numpy,MSeifert04/numpy,mattip/numpy,chiffa/numpy,ahaldane/numpy,grlee77/numpy,MSeifert04/numpy,anntzer/numpy,mhvk/numpy,bertrand-l/numpy,pizzathief/numpy,chiffa/numpy,shoyer/numpy,ddasilva/numpy,tynn/numpy,simongibbons/numpy,pbrod/numpy,MSeifert04/numpy,joferkington/numpy,pbrod/numpy,seberg/numpy,Eric89GXL/numpy,jakirkham/numpy,SiccarPoint/numpy,bertrand-l/numpy,ahaldane/numpy