Career Strategy Layer functionality

Not remotely finished.
Career Strategy Layer functionality

... now working, just without persistence. Which I'm struggling with so
waiting on the wife to do it. It's all that's left to do for this part.
R&T for handoff
More R&T for handoff to Ravencrow
Persistence
Merge pull request #2 from ravencrow-/master

Persistence
Few more bits for stage 1 of career strategy
WIP on getting launchsites considered as

... space centres (for purposes of recovery only). medsouz, jump in if
you have some thoughts on getting this to work.
WIP of base founding and managing
New launch selector icon that isn't a penis
WIP

Loads of stuff coming along nicely
- All open launch sites in career are temporarily treated as the space
centre when you recover
- KK Base Boss: creating new launchsites in career is mostly working.
Still need to do KK specific assets, set up lots of limiters and error
capture so idiot players don't harass us overly. And persistence for
instances per save. Oh that'll be fun.
WIP
Stable Release Candidate

- A lot of experimental code related to founding bases has been torn
out. It wasn't working and I got fed up trying to make it work. It
wasn't fun anymore.
- In a career game, recovery is now based on the nearest open base. This
took some serious persuasion of KSP to temporarily accept a launchsite
as the space centre. More often than not the recovery report given still
states the range from the KSC but it's actually the range from the
nearest open base. I haven't figured out how to fix that widget yet.
- Added a Base Boss app to the flight scene in career games. Right now
all it does is tell you the range to the nearest base and nearest open
base.
WIP of a simple ATC feature
Base Boss WIP

- Can open a base you land at for half the price in the launch site
selector
- List of facilities at a base
Stable Release (v0.6)

* The Launch Site Selector is now draggable in the VAB and SPH.
* Added Base Boss app to tracking station and map view. Use this to
toggle icons of open and closed bases in career mode, and to toggle
icons of rocketpads, helipads, runways and other launchsites in all game
modes.
* The Base Boss app in flight-scenes has some new features.
* In career mode, if you are landed within 2000m of a closed base, using
the Base Boss you can now open that base for half the funds it would
cost in the launch site selector of the VAB and SPH.
* When landed within 2000m of a base, the facilities at that base will
be listed in the Base Boss. Currently this is just for information and
this feature will be expanded on in a future version of KK.
* A simple ATC feature can be enabled and disabled in the Base Boss.
When enabled, you will recieve messages from open bases when you enter
their airspace or leave their airspace. These are accessed by the KSP
message widget on the right end of the KSP toolbar. This feature will be
expanded on in a future version of KK (hopefully with the addition of
audio!)
WIP
WIP
Stable Release (v0.6.1)
WIP