added toExist matcher
added toExist matcher

FokkeZB/alloy,NadsonFernando/alloy,bhatfield/alloy,NadsonFernando/alloy,jppope/alloy,jppope/alloy,WY08271/alloy,4talesa/alloy,jppope/alloy,brentonhouse/brentonhouse.alloy,xavierlacot/alloy,NadsonFernando/alloy,FokkeZB/alloy,WY08271/alloy,mobilehero/adamantium,brentonhouse/brentonhouse.alloy,4talesa/alloy,indera/alloy,xavierlacot/alloy,xavierlacot/alloy,bhatfield/alloy,WY08271/alloy,bhatfield/alloy,4talesa/alloy,indera/alloy,indera/alloy,jvkops/alloy,brentonhouse/brentonhouse.alloy,jvkops/alloy,FokkeZB/alloy,jvkops/alloy,mobilehero/adamantium,mobilehero/adamantium