v0.4 update: bug free with hello world!

1. bugfix: fix mspace pagesize 64bit point cut-off
2. executable binary file integrate with boot dex.

how to use this binary?

1. current version only support exec the integrated hello world dex
2. use chmod to give the binary executable permission
3. exec the binary with this arg: -cp hello.dex com.dexvm.test.Main