Merge pull request #3 from LuaDist/downstream

lua 5.2 compat
Adapting config and Makefile to new Compat-5.2.
Adding compatibility to Lua versions 5.0, 5.1 and 5.2.
Update do version 1.2.
Merge tag 'v1.2' of https://github.com/keplerproject/md5 into update

* tag 'v1.2' of https://github.com/keplerproject/md5:
  Update do version 1.2.
  Adding compatibility to Lua versions 5.0, 5.1 and 5.2.
  Adapting config and Makefile to new Compat-5.2.
Update to 1.2
Removed object file