ast.py : add Array object support
test : test for array object array1.n -
ezhil_parser.py : parse array definition expressions within [,] etc
this should support nested arrays as well
allow expressions in arrays and nested arrays
Interpreter.py : adding right form of input - really only read strings always
guess.n : donot show the secret onscreen
sort.n : - ?
tables.n : - ?
test: add test point for array sum - array2.n