- put abstract types and aliases in Dtype of tysymbol
- put (recursive) algebraic types in Ddata of (ts,constr list) list
- put abstract function/predicate symbols in Dparam of lsymbol
- put defined logic symbols in Dlogic of (ls,ls_definition) list

also, produce less noise on plugin detection
also, use -linkall to compile our binaries

This reverts commit 88191716.

It seems that by default agressive monomorphisation costs too much.
One could be interested, however, in having it as a user-accessible
transformation in IDE.

Produce more monomorphic instances. On the current Why3 examples we
gain more goal than we lose.

As they say, "A penny saved is ridiculous."