MacOs installation issue, libraries should be placed at bin.

[jgalan]

Recently we experienced some issues with make install not copying the restG4 binary and other components required. It seems the following PR #394 solved the problem.

That this is the case was confirmed at the following post at the rest-forum https://rest-forum.unizar.es/t/macos-installation-issue-missing-files-headers-bin/573/5

However, there are still some issues with some libraries (e.g. libRestRestG4.dylib) not being copied, as mentioned by @heucheld who states those libraries need to be copied to the bin directory.

Although I don't understand very much why those libraries should be at the bin directory we could create a condition for MacOs so that those libraries are installed to bin?

Perhaps we should understand better why those libraries need to be copied to bin and if this happens at any MacOs version.