Move duplicated utilities to the common util folder and remove NEXT_DIR (#29)

* move things to the common library and remove next_dir

* fix for windows

* one last windows fix

* last fix for real this time

* debug listener test

* fix listener threading bug

test_code_coverage.sh

@@ -3,7 +3,5 @@
 # Directory of this script
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
-export NEXT_DIR=$DIR
-export FAKE_ISO_PATH=/game/fake_iso.txt
 cd $DIR/build/
 make goalc-test_coverage