added simple example to readme
added simple example to readme

perwendel/spark,sebastian1118/spark,guilhermehbueno/spark,xdcrafts/spark,gimlet2/spark,Tradunsky/spark,universsky/spark-1,alexlondon07/spark,micsta/spark,nacx/spark,rokusr/spark,hendrosteven/spark,jacek99/spark,opsonsy/spark,guicamest/spark,marstianna/spark,borud/spark,greyheart/spark,sebastian1118/spark,rokusr/spark,martylamb/spark,stylismo/spark,gimlet2/spark,opsonsy/spark,zeroflag/spark,tempbottle/spark-1,borud/spark,ztx1491/spark,tempbottle/spark-1,Tradunsky/spark,nacx/spark,gutobortolozzo/spark,stylismo/spark,micsta/spark,jacek99/spark,Ariel-Isaacm/spark,arekkw/spark,nkhuyu/spark-1,despegar/spark,arekkw/spark,alexlondon07/spark,gimlet2/spark,xdcrafts/spark,hendrosteven/spark,heuermh/spark-1,gimlet2/spark,northcapen/spark,greyheart/spark,marstianna/spark,seetharamireddy540/spark,mugizico/spark,ganger85/spark,nkhuyu/spark-1,ganger85/spark,jabgibson/spark,guicamest/spark,perwendel/spark,stylismo/spark,MouettE-SC/spark,northcapen/spark,PYangDizzle/Spark,guilhermehbueno/spark,MouettE-SC/spark,mugizico/spark,martylamb/spark,perwendel/spark,ztx1491/spark,PYangDizzle/Spark,heuermh/spark-1,Ariel-Isaacm/spark,seetharamireddy540/spark,despegar/spark,stylismo/spark,jabgibson/spark,zeroflag/spark,rokusr/spark,MouettE-SC/spark,universsky/spark-1,gutobortolozzo/spark,micsta/spark