Use lrpar for parsing, big 'ol syntax overhaul

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

src/vm/mod.rs

@@ -1,10 +1,8 @@
-pub mod disassemble;
+pub mod common;
 pub mod error;
 pub mod flags;
 pub mod inst;
 pub mod mem;
 pub mod obj;
 pub mod reg;
-mod tick;
-pub mod visit;
-pub mod vm;
+pub mod state;