Forked JikesRVM 3.1.3 for the basic execution environment

http://jikesrvm.org/

We utilize the Jikes RVM (Research Virtual Machine), to execute Java programs.
It is an open-source Java Virtual Machine (JVM), entirely written in Java
(meta-circular). It runs on Unix-like operating systems with PowerPC or Intel
x86 (32-bit) instruction set.