More array helpers. More checkEOL.

- New helpers nextLine(), BuildBasicArray(int, boolean, int),
ListToBasicNumericArray(int, Iterable <Double>, int), and
ListToBasicStringArray(int, Iterable <String>, int).
- Touched GetArrayValue, DumpArray, doArray, executeDir, executeVibrate,
execute_gr_newdl, execute_gr_set_pixels, execute_sensors_list,
execute_array_length, LoadNumericArray, LoadStringArray,
execute_array_collection, execute_array_sum, execute_array_copy.
- Mostly rippling getArrayVarForRead/Write and new helpers in order to
share code and add/standardize runtime error messages.
- Added checkEOL to some of the array commands.
- Also removed intermediate lists from execute_array_copy.