Change company name to "rev.ng Labs Srl" in all license headers
to reflect changed company name and legal status
Add missing license headers to files that didn't have one
The method which computes the weight for a `BasicBlockNode` now relies
on a new `WeightTraits` which is specialized for `BasicBlock` and for
`DotNode`.
In this way, we can change the implementation of the `getWeight` method
without having to modify the implementation inside the `revng` project.
`BasicBlockNode` and `RegionCFG` classes are now template classes. This
means that the `BasicBlockNode` class can be used as a generic wrapper
for any type of object in the original graph (it is usually used to wrap
a `llvm::BasicBlock *` for decompilation purposes, but in tests it can
be used to wrap a `DotNode` object) that implementes `GraphTraits`.
Giacomo Vercesi