Added command "POST /session/:sessionId/element/:id/click".
Added command "POST /session/:sessionId/element/:id/click".

Based on Alexander Anderson code (couldn't cherry-pick).
detro/ghostdriver,yuanzhen/ghostdriver,xsyntrex/ghostdriver,amikey/ghostdriver,kuahyeow/ghostdriver,HelioGuilherme66/ghostdriver,jesg/ghostdriver,detro/ghostdriver,51ttw/ghostdriver,Vitallium/ghostdriver,testingbot/ghostdriver,Lochlan/ghostdriver,HelioGuilherme66/ghostdriver,testingbot/ghostdriver,treejames/ghostdriver,treejames/ghostdriver,Vitallium/ghostdriver,51ttw/ghostdriver,jesg/ghostdriver,jesg/ghostdriver,Lochlan/ghostdriver,jesg/ghostdriver,asolntsev/ghostdriver,HelioGuilherme66/ghostdriver,amikey/ghostdriver,kuahyeow/ghostdriver,antoinereyt/ghostdriver,xsyntrex/ghostdriver,testingbot/ghostdriver,stevenliuit/ghostdriver,stevenliuit/ghostdriver,testingbot/ghostdriver,acarpe/ghostdriver,yuanzhen/ghostdriver,detro/ghostdriver,acarpe/ghostdriver,asolntsev/ghostdriver,antoinereyt/ghostdriver