Lists in Malluscript

[Sreyas-Sreelal]

Adds support for Lists
Example usage:

x = [1,4,5,6,"malluscript"];
x = x + "more data";
i = 0;
i um 6 um onnallenkil avarthikuga {
    ezhuthuga x[i] + " ";
    i = i+1;
}

Addition with list on left hand and any other data on right hand equates to appending data to list.