Header: Adds changes to build file in order to be able to attach icons to new game and modify game buttons

Adds changes to build file so that we can get the path in getResource() function

Reported-by: lhnguyenduc & bnurbekov
Signed-off by: Long Nguyen <lhnguyenduc@wpi.edu> & Batyrlan Nurbekov <bnurbekov@wpi.edu>
Merge pull request #50 from hlong290494/sbl-dev

Changed build file and modified closable tab listener