Successful first run of B interpreter!

I hand compiled hello.b into hello.s and assembled with the interpreter
and runtime library:
perl as7 --out a.out bl.s hello.s bi.s

src/other/hello.b

@@ -0,0 +1,9 @@
+main $(
+  write('He');
+  write('ll');
+  write('o,');
+  write(' W');
+  write('or');
+  write('ld');
+  write('!*n');
+$)