LegacyFSM example should be renamed

[dvojtise]

Now that we have other technology specific examples, (such as K3FSM) we now should rename the LegacyFSM in something clearer.

If the example mimics code reuse of a "legacy" language as a general concerns, this name doesn't help to understand implied technologies and how the languages are built.

This is actually an example of use of GEMOC with Melange+K3 in order create 2 languages that inherits one from another (thus enabling model conversion, editor code reuse, etc)

my suggestion: MelangeK3FSM

other suggestions are welcome for a better name... 😉

[dvojtise]

any opposition for this name: MelangeK3FSM ?

(I don't want to start the renaming without consent, since the example is also used in the test, it'll be a tedious work)

[ebousse]

MelangeK3FSM is good for me, it would me much clearer than the current names available in the examples menu :)

[dvojtise]

I also plan to change the "sample" part to "example" which is probably a better English term

[dvojtise]

done and distributed with PR #136