Use runsikuli from $PATH, so that the tests may be run outside of Travis

.travis.yml

@@ -27,6 +27,7 @@ install:
   - mkdir ~/sikulix/
   - wget https://launchpadlibrarian.net/359997648/sikulixsetup-1.1.2.jar -O ~/sikulix/sikulixsetup-1.1.2.jar
   - (cd ~/sikulix && java -jar sikulixsetup-1.1.2.jar options 1 1.1)
+  - export PATH="$HOME/sikulix/:$PATH"
 
 env:
   - MODE=qemu-system-i386

test/qemu-system-i386.sh

@@ -5,5 +5,5 @@ os_file="example-os/os.sh"
 
 qemu-system-i386 -drive format=raw,file=${os_file},index=0,if=floppy &
 pid=$!
-~/sikulix/runsikulix -r test/check-gradient.sikuli
+runsikulix -r test/check-gradient.sikuli
 kill $pid