Make FlexOTube require KAS

I suggest setting up the part file so that the FlexOTube is only visible to the player if KAS is installed. The code that enables the part requires Module Manager, of course, but since KAS uses it heavily this isn't actually a new dependency.
Removed scanners, added new harvester
Merge pull request #53 from Starstrider42/patch-1

Make FlexOTube require KAS
Initial tech tree and module refactoring
More tech tree updates
More 0.18 updates (modules)

Changed nodes, removed internals, added new module base
Config updates, better attachment for the ModuleBase
Harvester and PDU buffs
Fixed the tech tree because I can't type curly braces
More tweaking, module deprecation, tech tree stuff
Config tweaks
Some model tweaks
Module Base fixes
Ag module, config changes
Fixed 'hopping base' issue
Fixed bug w/Log Hub resources
Deprecated the Hub Antenna
Update README.md
Update README.md
Moved Proxy range to 2000