Steps creating FSM example

_From @zzhang03 on November 29, 2017 4:0_

Hi gemoc team,

Could you give a brief tutorial about the steps to create FSM example from scratch (with metamodel, edit and editor projects only)? I'm trying to add semantics to the TTC 2015 train benchmark case using the metamodel in the figure 3 of http://ceur-ws.org/Vol-1524/paper2.pdf but I'm getting errors. I think I did something wrong when creating the projects and I'm really confused about how should I create the k3dsa and the 2 melange projects (and the xsfsm.xsfsm, trace, etc.)

_Copied from original issue: gemoc/gemoc-studio#59_