fix parser error in ruby 1.9, where instance_variables are symbols. closes #61
fix parser error in ruby 1.9, where instance_variables are symbols. closes #61

risuiowa/surveyor,Guestfolio/surveyor,blueboard/surveyor,NUBIC/surveyor,risuiowa/surveyor,lampo/surveyor,lampo/surveyor,anitsirc/surveyor,markedmondson/surveyor,serracorwin/surveyor,blueboard/surveyor,lampo/surveyor,bricesanchez/surveyor,Guestfolio/surveyor,lampo/surveyor,Guestfolio/surveyor,NUBIC/surveyor,NUBIC/surveyor,alanjcfs/surveyor,alanjcfs/surveyor,bricesanchez/surveyor,alanjcfs/surveyor,Guestfolio/surveyor,markedmondson/surveyor,blueboard/surveyor,markedmondson/surveyor,serracorwin/surveyor,bricesanchez/surveyor,serracorwin/surveyor,HeHStudy/surveyor,risuiowa/surveyor,fhisamoto/surveyor,blueboard/surveyor,fhisamoto/surveyor,HeHStudy/surveyor,anitsirc/surveyor,fhisamoto/surveyor,anitsirc/surveyor,HeHStudy/surveyor,HeHStudy/surveyor,risuiowa/surveyor,anitsirc/surveyor,bricesanchez/surveyor,fhisamoto/surveyor,alanjcfs/surveyor