Toolbar fixes and Scanner Hub changes

The version bump to 3.0 is because we now have a couple of new dependencies on some community libraries. This is needed to address some conflicts between this mod and others. The root of the problem is that the KSP API's for controlling toolbar buttons and some related resources are written with the assumption that all mods know about all other mods... Not a good thing. The way the community has dealt with this is to have a library that basically manages the cooperation. PKS now uses that library rather than the KSP API's directly.

With this change, it's now no longer necessary to have scanner parts in orbit of the body they are scanning - they just need to be in the system. For example, you can have a station orbiting Duna that has scanners for both Duna and Ike. This change was made so that folks could have a single busy station instead of a bunch of sparsely populated ones.

And last but not least, there it's now possible to manually control resource transfer.