Fixed README.md to include sourcing of mkvirtualenv
Fixed README.md to include sourcing of mkvirtualenv

Added .bashrc or .bash_profile instructions for sourcing /usr/local/bin/virtualenvwrapper.sh in order to use the environment created by the
mkvirtualenv command. This is necessary to enter the environment.

zrs233/ursula,kennjason/ursula,wupeiran/ursula,twaldrop/ursula,sivakom/ursula,nirajdp76/ursula,persistent-ursula/ursula,knandya/ursula,sivakom/ursula,wupeiran/ursula,edtubillara/ursula,davidcusatis/ursula,MaheshIBM/ursula,kennjason/ursula,rongzhus/ursula,ryshah/ursula,blueboxgroup/ursula,persistent-ursula/ursula,j2sol/ursula,j2sol/ursula,pgraziano/ursula,kennjason/ursula,rongzhus/ursula,paulczar/ursula,panxia6679/ursula,MaheshIBM/ursula,blueboxgroup/ursula,fancyhe/ursula,ddaskal/ursula,knandya/ursula,j2sol/ursula,lihkin213/ursula,greghaynes/ursula,j2sol/ursula,narengan/ursula,twaldrop/ursula,davidcusatis/ursula,nirajdp76/ursula,ryshah/ursula,masteinhauser/ursula,channus/ursula,davidcusatis/ursula,fancyhe/ursula,zrs233/ursula,masteinhauser/ursula,masteinhauser/ursula,pgraziano/ursula,edtubillara/ursula,twaldrop/ursula,msambol/ursula,rongzhus/ursula,ddaskal/ursula,sivakom/ursula,msambol/ursula,panxia6679/ursula,fancyhe/ursula,MaheshIBM/ursula,narengan/ursula,pgraziano/ursula,panxia6679/ursula,channus/ursula,ryshah/ursula,dlundquist/ursula,dlundquist/ursula,masteinhauser/ursula,zrs233/ursula,dlundquist/ursula,ddaskal/ursula,fancyhe/ursula,lihkin213/ursula,channus/ursula,paulczar/ursula,nirajdp76/ursula,greghaynes/ursula,wupeiran/ursula,greghaynes/ursula,knandya/ursula,ryshah/ursula,rongzhus/ursula,edtubillara/ursula,nirajdp76/ursula,pgraziano/ursula,blueboxgroup/ursula,aldevigi/ursula,lihkin213/ursula,zrs233/ursula,persistent-ursula/ursula,aldevigi/ursula,blueboxgroup/ursula,channus/ursula,narengan/ursula,edtubillara/ursula,ddaskal/ursula,msambol/ursula,wupeiran/ursula,knandya/ursula,paulczar/ursula,lihkin213/ursula,twaldrop/ursula,persistent-ursula/ursula,aldevigi/ursula,narengan/ursula,panxia6679/ursula