[PD] deken install user experience

I'm just trying deken for the first time, awesome piece of work! I'd like to find a little time to contribute to it, to smooth out the user experience for newbies. I can see there are all sorts of use cases for all of the install options that it currently provides, but it is pretty confusing for most people who just want to use a library. I don't want to step on any toes, so I thought I'd throw out some ideas here:

• hide all incompatible library version by default (e.g. hide OSX and

Windows versions on GNU/Linux)

• by default, install into user's pd externals folder without any prompt

(~/pd-externals, etc)

• add "Advanced Mode" or "Expert Mode" that shows the current user

experience

• remember which mode the user has selected across pd starts (e.g. make

a pref)

.hc