Add README to the Scala collector.
Add README to the Scala collector.

danwald/snowplow,RajeshHegde/snowplow,bigdecisions/snowplow,ClaraVista-IT/snowplow,danwald/snowplow,simplybusiness/snowplow-fork,diamondo25/snowplow,pkallos/snowplow,digitized-io/snowplow,ClaraVista-IT/snowplow,conversionlogic/snowplow,aldemirenes/snowplow,danwald/snowplow,RajeshHegde/snowplow,liveintent-berlin/snowplow,bigdecisions/snowplow,yonglehou/snowplow,guardian/snowplow,nakulgan/snowplow,mdavid/lessig-bigdata,artsy/snowplow,rogervaas/snowplow,chuwy/snowplow-ci,nakulgan/snowplow,chuwy/snowplow-ci,liveintent-berlin/snowplow,AliciaJackson/snowplow,ecoron/snowplow,yonglehou/snowplow,conversionlogic/snowplow,mdavid/lessig-bigdata,ClaraVista-IT/snowplow,snowplow/snowplow,paulhendricks/snowplow,waysay/snowplow,polarBearGit/snowplow,pkallos/snowplow,pkallos/snowplow,waysay/snowplow,yeghishe/snowplow,jramos/snowplow,acgray/snowplow,MicBrain/snowplow,ecoron/snowplow,TimothyKlim/snowplow,haensel-ams/snowplow,jramos/snowplow,yeghishe/snowplow,RajeshHegde/snowplow,AliciaJackson/snowplow,nakulgan/snowplow,atotech/snowplow,snowplow/snowplow,bigdecisions/snowplow,polarBearGit/snowplow,MicBrain/snowplow,krahman/snowplow,atotech/snowplow,yonglehou/snowplow,paulhendricks/snowplow,diamondo25/snowplow,ecoron/snowplow,Propertyfinder/snowplow,liveintent-berlin/snowplow,TimothyKlim/snowplow,wesley1001/snowplow,wesley1001/snowplow,simplybusiness/snowplow-fork,MicBrain/snowplow,digitized-io/snowplow,guardian/snowplow,mdavid/lessig-bigdata,yeghishe/snowplow,diamondo25/snowplow,wesley1001/snowplow,digitized-io/snowplow,conversionlogic/snowplow,nakulgan/snowplow,TimothyKlim/snowplow,TimothyKlim/snowplow,krahman/snowplow,wesley1001/snowplow,artsy/snowplow,ClaraVista-IT/snowplow,yeghishe/snowplow,RajeshHegde/snowplow,Propertyfinder/snowplow,wesley1001/snowplow,thebeansgroup/snowplow,janeefting/snowplow,thebeansgroup/snowplow,liveintent-berlin/snowplow,Propertyfinder/snowplow,RetentionGrid/snowplow,RetentionGrid/snowplow,aldemirenes/snowplow,paulhendricks/snowplow,bigdecisions/snowplow,ecoron/snowplow,RetentionGrid/snowplow,diamondo25/snowplow,artsy/snowplow,TimothyKlim/snowplow,liveintent-berlin/snowplow,danwald/snowplow,haensel-ams/snowplow,simplybusiness/snowplow-fork,chuwy/snowplow-ci,waysay/snowplow,digitized-io/snowplow,guardian/snowplow,MicBrain/snowplow,sspinc/snowplow,RetentionGrid/snowplow,yeghishe/snowplow,atotech/snowplow,bigdecisions/snowplow,haensel-ams/snowplow,AliciaJackson/snowplow,chuwy/snowplow-ci,rogervaas/snowplow,AliciaJackson/snowplow,yonglehou/snowplow,haensel-ams/snowplow,thebeansgroup/snowplow,RajeshHegde/snowplow,ecoron/snowplow,sspinc/snowplow,artsy/snowplow,conversionlogic/snowplow,janeefting/snowplow,RajeshHegde/snowplow,janeefting/snowplow,aldemirenes/snowplow,jramos/snowplow,acgray/snowplow,yonglehou/snowplow,acgray/snowplow,krahman/snowplow,AliciaJackson/snowplow,paulhendricks/snowplow,mdavid/lessig-bigdata,waysay/snowplow,jramos/snowplow,aldemirenes/snowplow,chuwy/snowplow-ci,polarBearGit/snowplow,snowplow/snowplow,thebeansgroup/snowplow,sspinc/snowplow,atotech/snowplow,mdavid/lessig-bigdata,liveintent-berlin/snowplow,acgray/snowplow,RetentionGrid/snowplow,nakulgan/snowplow,acgray/snowplow,simplybusiness/snowplow-fork,snowplow/snowplow,polarBearGit/snowplow,aldemirenes/snowplow,acgray/snowplow,rogervaas/snowplow,atotech/snowplow,pkallos/snowplow,MicBrain/snowplow,Propertyfinder/snowplow,rogervaas/snowplow,rogervaas/snowplow,guardian/snowplow,conversionlogic/snowplow,aldemirenes/snowplow,ClaraVista-IT/snowplow,bigdecisions/snowplow,Propertyfinder/snowplow,simplybusiness/snowplow-fork,danwald/snowplow,atotech/snowplow,janeefting/snowplow,thebeansgroup/snowplow,Propertyfinder/snowplow,jramos/snowplow,polarBearGit/snowplow,haensel-ams/snowplow,sspinc/snowplow,haensel-ams/snowplow,sspinc/snowplow,nakulgan/snowplow,paulhendricks/snowplow,sspinc/snowplow,waysay/snowplow,janeefting/snowplow,digitized-io/snowplow,chuwy/snowplow-ci,diamondo25/snowplow,simplybusiness/snowplow-fork,krahman/snowplow,artsy/snowplow