Relation Between fml4 And fml8 Development Branch.

We implement new features at fml8 branch. fml4 imports it if needed. We only have to bug-fix at fml4 branch.

(further translation omited).

               fml-devel
             -----------------------------> 8.0
                       A  |
                       |  | (interaction)
                       |  V
1.2 ->  4.0 ------------------------------> 4.0-current
              |      |
            4.0.1   4.0.2 .... (release / 4.0-stable release)