BLE download from EON Steel on Android

[Dirk Hohndel]

Linus,

I pushed out your changes to master.
With the latest Subsurface master and libdc Subsurface-branch I was able
to download dives from my EON Steel via BLE on Android.

Well, I was able to do it exactly once. I used the Nordic app to bond the
dive computer, then started the download from Subsurface. It worked
perfectly.

Since then I haven't been able to get the EON Steel to connect to my
phone... there's clearly some magic order of things that I happened to get
right that one time but don't quite know how to reproduce. But that said,
I had one successful attempt. And yes, you are right. This is SLOW.

Anyway, if others want to try, the APK with which this worked for me is
up:

http://subsurface-divelog.org/downloads/test/Subsurface-mobile-4.6.4.283-arm.apk

Testing, success and failure stories, and of course patches are welcome
:-)

/D