Add editor config
Add editor config

Configure indent style and spaces across different editors. This should
make contributions a tiny bit easier.

Tobion/guzzle,Brunty/guzzle,Tony133/guzzle,sulfo/guzzle,mikicaivosevic/guzzle,justincy/guzzle,staylor/guzzle,thinsoldier/guzzle,atrauzzi/guzzle,kkopachev/guzzle,lahmizzar/guzzle,jeskew/guzzle,michabbb-backup/guzzle,mortenhauberg/guzzle,nazo/guzzle,grokify/guzzle,staylor/guzzle,paveljanda/guzzle,wherefortravel/guzzle,nazo/guzzle,duyhuynhngoc/guzzle,mrm/guzzle,cenxun/guzzle,duyhuynhngoc/guzzle,stefanruijsenaars/guzzle,cenxun/guzzle,checat/guzzle,lahmizzar/guzzle,videni/guzzle,jeskew/guzzle,checat/guzzle,atrauzzi/guzzle,EdgarPE/guzzle,BostjanOb/guzzle,guzzle/guzzle,sulfo/guzzle,mustafavelioglu/guzzle,phlogisticfugu/guzzle,javierTerry/guzzle,Brunty/guzzle,stefanruijsenaars/guzzle,grokify/guzzle,WebSeed/guzzle,paveljanda/guzzle,michabbb-backup/guzzle,justincy/guzzle,vrkansagara/guzzle,WebSeed/guzzle,rajaehtesham/guzzle,rajaehtesham/guzzle,vrkansagara/guzzle,wherefortravel/guzzle,BostjanOb/guzzle,phlogisticfugu/guzzle,Tony133/guzzle,chengky/guzzle,Briareos/guzzle,guzzle/guzzle,mubassirhayat/guzzle,ehough/guzzle,stea4lth/guzzle,mustafavelioglu/guzzle,mikicaivosevic/guzzle,mortenhauberg/guzzle,Tobion/guzzle,hussainweb/guzzle,Naktibalda/guzzle,chengky/guzzle,stea4lth/guzzle,EdgarPE/guzzle,ehough/guzzle,hussainweb/guzzle,Briareos/guzzle,sahat/guzzle,thinsoldier/guzzle,videni/guzzle,Naktibalda/guzzle,javierTerry/guzzle,dshafik/guzzle,mrm/guzzle,kkopachev/guzzle,Rinat-wc/guzzle,dshafik/guzzle,Rinat-wc/guzzle