Added InputStream, Tokenizer, and Parser(unfinished) class. Changed Newerth to Aevum

src/Netscript/InputStream.js

@@ -0,0 +1,25 @@
+/* InputStream class. Creates a "stream object" that provides operations to read
+ * from a string. */
+function InputStream(input) {
+    var pos = 0, line = 1, col = 0;
+    return {
+        next  : next,
+        peek  : peek,
+        eof   : eof,
+        croak : croak,
+    };
+    function next() {
+        var ch = input.charAt(pos++);
+        if (ch == "\n") line++, col = 0; else col++;
+        return ch;
+    }
+    function peek() {
+        return input.charAt(pos);
+    }
+    function eof() {
+        return peek() == "";
+    }
+    function croak(msg) {
+        throw new Error(msg + " (" + line + ":" + col + ")");
+    }
+}