moved test scripts to new tests dir and made them executable

tests/slicer

@@ -0,0 +1,42 @@
+#!/usr/bin/env curly
+>main
+gto
+:slicer
+=step
+=to
+=from
+=str
+$from
+=i
+\
+=result
+:loop
+$result
+$str
+$i
+idx
+cat
+=result
+$i
+$step
+add
+=i
+$i
+$str
+len
+>loop
+glt
+$result
+ret
+:main
+\Avans Hogeschool
+=text
+$text
+0
+$text
+len
+2
+>slicer
+fun
+out
+end