DOC: Add examples to scipy.stats
DOC: Add examples to scipy.stats

* Examples for gmean, hmean, moment, variation, skew, kurtosis, skewtest,
  kurtosistest
* Various changes according to PEP8

tylerjereddy/scipy,aeklant/scipy,perimosocordiae/scipy,aeklant/scipy,arokem/scipy,WarrenWeckesser/scipy,jamestwebber/scipy,jamestwebber/scipy,arokem/scipy,mdhaber/scipy,pizzathief/scipy,jamestwebber/scipy,nmayorov/scipy,apbard/scipy,Stefan-Endres/scipy,zerothi/scipy,nmayorov/scipy,anntzer/scipy,person142/scipy,apbard/scipy,e-q/scipy,perimosocordiae/scipy,anntzer/scipy,aarchiba/scipy,matthew-brett/scipy,tylerjereddy/scipy,andyfaff/scipy,befelix/scipy,jor-/scipy,pbrod/scipy,matthew-brett/scipy,endolith/scipy,andyfaff/scipy,aeklant/scipy,ilayn/scipy,mdhaber/scipy,grlee77/scipy,person142/scipy,e-q/scipy,mdhaber/scipy,scipy/scipy,arokem/scipy,mdhaber/scipy,gertingold/scipy,e-q/scipy,WarrenWeckesser/scipy,grlee77/scipy,rgommers/scipy,perimosocordiae/scipy,pbrod/scipy,rgommers/scipy,zerothi/scipy,zerothi/scipy,aeklant/scipy,arokem/scipy,vigna/scipy,josephcslater/scipy,scipy/scipy,befelix/scipy,anntzer/scipy,vigna/scipy,gfyoung/scipy,aarchiba/scipy,matthew-brett/scipy,befelix/scipy,Stefan-Endres/scipy,nmayorov/scipy,apbard/scipy,WarrenWeckesser/scipy,jamestwebber/scipy,jor-/scipy,ilayn/scipy,grlee77/scipy,tylerjereddy/scipy,josephcslater/scipy,befelix/scipy,gfyoung/scipy,Eric89GXL/scipy,nmayorov/scipy,lhilt/scipy,zerothi/scipy,rgommers/scipy,person142/scipy,WarrenWeckesser/scipy,pbrod/scipy,gfyoung/scipy,aeklant/scipy,perimosocordiae/scipy,pbrod/scipy,endolith/scipy,pizzathief/scipy,lhilt/scipy,vigna/scipy,gertingold/scipy,jamestwebber/scipy,josephcslater/scipy,rgommers/scipy,ilayn/scipy,e-q/scipy,pizzathief/scipy,scipy/scipy,ilayn/scipy,scipy/scipy,matthew-brett/scipy,aarchiba/scipy,Stefan-Endres/scipy,jor-/scipy,gertingold/scipy,nmayorov/scipy,person142/scipy,Eric89GXL/scipy,anntzer/scipy,andyfaff/scipy,gfyoung/scipy,lhilt/scipy,zerothi/scipy,matthew-brett/scipy,arokem/scipy,andyfaff/scipy,zerothi/scipy,anntzer/scipy,scipy/scipy,gertingold/scipy,josephcslater/scipy,tylerjereddy/scipy,scipy/scipy,aarchiba/scipy,aarchiba/scipy,grlee77/scipy,endolith/scipy,ilayn/scipy,Eric89GXL/scipy,gertingold/scipy,gfyoung/scipy,WarrenWeckesser/scipy,andyfaff/scipy,Eric89GXL/scipy,Eric89GXL/scipy,anntzer/scipy,andyfaff/scipy,jor-/scipy,endolith/scipy,tylerjereddy/scipy,perimosocordiae/scipy,e-q/scipy,person142/scipy,WarrenWeckesser/scipy,lhilt/scipy,pbrod/scipy,Stefan-Endres/scipy,josephcslater/scipy,mdhaber/scipy,vigna/scipy,Stefan-Endres/scipy,apbard/scipy,ilayn/scipy,mdhaber/scipy,endolith/scipy,pbrod/scipy,rgommers/scipy,lhilt/scipy,grlee77/scipy,endolith/scipy,Stefan-Endres/scipy,vigna/scipy,jor-/scipy,pizzathief/scipy,perimosocordiae/scipy,apbard/scipy,Eric89GXL/scipy,pizzathief/scipy,befelix/scipy