[doc] Improve getting started section
[doc] Improve getting started section

Removed or rewrote old Django parts

ChenJunor/hue,rahul67/hue,sanjeevtripurari/hue,pwong-mapr/private-hue,xq262144/hue,epssy/hue,hdinsight/hue,yongshengwang/hue,hdinsight/hue,kawamon/hue,todaychi/hue,yoer/hue,x303597316/hue,todaychi/hue,pwong-mapr/private-hue,vmax-feihu/hue,azureplus/hue,fangxingli/hue,x303597316/hue,abhishek-ch/hue,pratikmallya/hue,yongshengwang/hue,x303597316/hue,lumig242/Hue-Integration-with-CDAP,yoer/hue,jayceyxc/hue,hdinsight/hue,vmax-feihu/hue,ahmed-mahran/hue,cloudera/hue,jayceyxc/hue,vitan/hue,epssy/hue,lumig242/Hue-Integration-with-CDAP,jjmleiro/hue,rahul67/hue,yongshengwang/hue,dulems/hue,nvoron23/hue,vmax-feihu/hue,MobinRanjbar/hue,fangxingli/hue,ChenJunor/hue,ChenJunor/hue,abhishek-ch/hue,xiangel/hue,abhishek-ch/hue,GitHublong/hue,azureplus/hue,rahul67/hue,xq262144/hue,jounex/hue,cloudera/hue,xiangel/hue,lumig242/Hue-Integration-with-CDAP,xq262144/hue,abhishek-ch/hue,Peddle/hue,kawamon/hue,sanjeevtripurari/hue,azureplus/hue,erickt/hue,fangxingli/hue,todaychi/hue,vmax-feihu/hue,Peddle/hue,xiangel/hue,nvoron23/hue,epssy/hue,yoer/hue,ahmed-mahran/hue,javachengwc/hue,jounex/hue,azureplus/hue,pwong-mapr/private-hue,cloudera/hue,yoer/hue,dulems/hue,javachengwc/hue,jounex/hue,lumig242/Hue-Integration-with-CDAP,hdinsight/hue,vitan/hue,cloudera/hue,xq262144/hue,mapr/hue,rahul67/hue,jjmleiro/hue,fangxingli/hue,x303597316/hue,mapr/hue,jjmleiro/hue,dulems/hue,javachengwc/hue,jayceyxc/hue,kawamon/hue,javachengwc/hue,fangxingli/hue,ahmed-mahran/hue,vitan/hue,rahul67/hue,azureplus/hue,yoer/hue,jjmleiro/hue,vmax-feihu/hue,cloudera/hue,kawamon/hue,jounex/hue,jjmleiro/hue,xiangel/hue,jjmleiro/hue,jayceyxc/hue,hdinsight/hue,fangxingli/hue,yongshengwang/hue,pratikmallya/hue,mapr/hue,cloudera/hue,hdinsight/hue,xiangel/hue,ChenJunor/hue,yongshengwang/hue,vmax-feihu/hue,jjmleiro/hue,kawamon/hue,xq262144/hue,lumig242/Hue-Integration-with-CDAP,kawamon/hue,yongshengwang/hue,dulems/hue,cloudera/hue,jayceyxc/hue,xiangel/hue,Peddle/hue,pratikmallya/hue,vmax-feihu/hue,ahmed-mahran/hue,kawamon/hue,todaychi/hue,sanjeevtripurari/hue,erickt/hue,x303597316/hue,MobinRanjbar/hue,ahmed-mahran/hue,jayceyxc/hue,abhishek-ch/hue,lumig242/Hue-Integration-with-CDAP,dulems/hue,cloudera/hue,javachengwc/hue,hdinsight/hue,kawamon/hue,mapr/hue,kawamon/hue,yoer/hue,kawamon/hue,erickt/hue,vitan/hue,Peddle/hue,kawamon/hue,lumig242/Hue-Integration-with-CDAP,epssy/hue,jounex/hue,kawamon/hue,cloudera/hue,kawamon/hue,GitHublong/hue,sanjeevtripurari/hue,cloudera/hue,nvoron23/hue,javachengwc/hue,epssy/hue,yongshengwang/hue,cloudera/hue,nvoron23/hue,nvoron23/hue,MobinRanjbar/hue,mapr/hue,MobinRanjbar/hue,mapr/hue,ChenJunor/hue,epssy/hue,javachengwc/hue,vitan/hue,nvoron23/hue,nvoron23/hue,ChenJunor/hue,x303597316/hue,rahul67/hue,cloudera/hue,ChenJunor/hue,sanjeevtripurari/hue,sanjeevtripurari/hue,jounex/hue,pratikmallya/hue,vitan/hue,kawamon/hue,sanjeevtripurari/hue,cloudera/hue,GitHublong/hue,abhishek-ch/hue,azureplus/hue,x303597316/hue,fangxingli/hue,todaychi/hue,yongshengwang/hue,Peddle/hue,epssy/hue,erickt/hue,azureplus/hue,abhishek-ch/hue,javachengwc/hue,dulems/hue,dulems/hue,kawamon/hue,ahmed-mahran/hue,kawamon/hue,lumig242/Hue-Integration-with-CDAP,ChenJunor/hue,kawamon/hue,Peddle/hue,jounex/hue,sanjeevtripurari/hue,nvoron23/hue,pwong-mapr/private-hue,yoer/hue,jjmleiro/hue,cloudera/hue,rahul67/hue,xq262144/hue,erickt/hue,MobinRanjbar/hue,xiangel/hue,GitHublong/hue,GitHublong/hue,GitHublong/hue,vitan/hue,pratikmallya/hue,epssy/hue,todaychi/hue,Peddle/hue,todaychi/hue,lumig242/Hue-Integration-with-CDAP,MobinRanjbar/hue,xq262144/hue,erickt/hue,erickt/hue,todaychi/hue,ahmed-mahran/hue,xq262144/hue,cloudera/hue,rahul67/hue,Peddle/hue,yoer/hue,todaychi/hue,pratikmallya/hue,vmax-feihu/hue,MobinRanjbar/hue,ahmed-mahran/hue,cloudera/hue,x303597316/hue,cloudera/hue,jayceyxc/hue,azureplus/hue,jounex/hue,fangxingli/hue,erickt/hue,pratikmallya/hue,mapr/hue,dulems/hue,jayceyxc/hue,GitHublong/hue,abhishek-ch/hue,GitHublong/hue,pratikmallya/hue,jjmleiro/hue,vitan/hue,pwong-mapr/private-hue,MobinRanjbar/hue,pwong-mapr/private-hue,cloudera/hue,xq262144/hue,kawamon/hue,Peddle/hue,hdinsight/hue,pwong-mapr/private-hue,jayceyxc/hue,xiangel/hue