Packages now reference their own node_modules

[joachimvh]

Lerna actually creates node_modules folder for every separate package.
Referencing those makes sure the packages can still stand on their own.
(And also fixes the Windows path problem).

[joachimvh]

This is for issue #1. I'm actually not a 100% sure yet I don't break anything with this since I can't get the whole system running yet but I think this might be an unrelated problem. :D

[joachimvh]

Update: got it working so I assume this is no problem

[joachimvh]

So I'm actually having issues making this same solution work on #4 . Not sure why yet, but after running install not all packages get their node_modules folder, so either Lerna doesn't work like I thought it did or something else is wrong.

[rubensworks]

This will not work unfortunately, because tslint and jest are only dev dependencies of the root project. (Something I wouldn't change because this would result in a lot of overhead if this is stored inside the node_modules of every package)

Lerna only links the dev dependencies that are present as Lerna packages, so in this case all the @comunica/* stuff.