DOC: already include 0.20 release notes for dev docs
DOC: already include 0.20 release notes for dev docs

MJuddBooth/pandas,amolkahat/pandas,nmartensen/pandas,amolkahat/pandas,cbertinato/pandas,cbertinato/pandas,amolkahat/pandas,toobaz/pandas,gfyoung/pandas,nmartensen/pandas,zfrenchee/pandas,rs2/pandas,jreback/pandas,cython-testbed/pandas,jreback/pandas,linebp/pandas,jreback/pandas,toobaz/pandas,linebp/pandas,nmartensen/pandas,kdebrab/pandas,GuessWhoSamFoo/pandas,datapythonista/pandas,pratapvardhan/pandas,pandas-dev/pandas,cython-testbed/pandas,Winand/pandas,harisbal/pandas,jmmease/pandas,gfyoung/pandas,winklerand/pandas,louispotok/pandas,winklerand/pandas,kdebrab/pandas,DGrady/pandas,TomAugspurger/pandas,rs2/pandas,jorisvandenbossche/pandas,pandas-dev/pandas,cbertinato/pandas,jmmease/pandas,gfyoung/pandas,pratapvardhan/pandas,GuessWhoSamFoo/pandas,pratapvardhan/pandas,rs2/pandas,Winand/pandas,GuessWhoSamFoo/pandas,linebp/pandas,gfyoung/pandas,toobaz/pandas,DGrady/pandas,MJuddBooth/pandas,dsm054/pandas,amolkahat/pandas,cbertinato/pandas,DGrady/pandas,TomAugspurger/pandas,winklerand/pandas,dsm054/pandas,kdebrab/pandas,harisbal/pandas,Winand/pandas,MJuddBooth/pandas,jorisvandenbossche/pandas,cython-testbed/pandas,jmmease/pandas,jmmease/pandas,gfyoung/pandas,dsm054/pandas,nmartensen/pandas,pandas-dev/pandas,louispotok/pandas,cython-testbed/pandas,rs2/pandas,TomAugspurger/pandas,winklerand/pandas,harisbal/pandas,louispotok/pandas,harisbal/pandas,zfrenchee/pandas,DGrady/pandas,datapythonista/pandas,GuessWhoSamFoo/pandas,toobaz/pandas,pandas-dev/pandas,jreback/pandas,winklerand/pandas,zfrenchee/pandas,harisbal/pandas,kdebrab/pandas,dsm054/pandas,louispotok/pandas,winklerand/pandas,louispotok/pandas,linebp/pandas,Winand/pandas,MJuddBooth/pandas,jreback/pandas,cbertinato/pandas,Winand/pandas,datapythonista/pandas,DGrady/pandas,Winand/pandas,zfrenchee/pandas,jmmease/pandas,toobaz/pandas,nmartensen/pandas,linebp/pandas,jorisvandenbossche/pandas,MJuddBooth/pandas,TomAugspurger/pandas,dsm054/pandas,DGrady/pandas,jmmease/pandas,cython-testbed/pandas,GuessWhoSamFoo/pandas,kdebrab/pandas,zfrenchee/pandas,nmartensen/pandas,datapythonista/pandas,pratapvardhan/pandas,amolkahat/pandas,linebp/pandas,pratapvardhan/pandas,jorisvandenbossche/pandas