ENH: Added NDFrame.slice_shift
ENH: Added NDFrame.slice_shift

added slice_shift func docs and removed freq argument

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