Cleaned up and rebased "libdivecomputer-NG" branch

[Dirk Hohndel]

> On Apr 24, 2018, at 5:59 PM, Dirk Hohndel <dirk at hohndel.org> wrote:
>> 
>> Oh, and I realized that I should also mention that I didn't apply your
>> fixes. I (obviously) had no test coverage for them, but they all
>> looked fine.
>> 
>> So you'll need to cherry pick or rebase your transport patches and the
>> Android stuff. My rebased branch was the same old contents, just
>> cleaned up.

Actually, the removal of the old BLE code made the Android patch unnecessary.
But I’ll add the discovery of supported dive computers while I’m at it.

/D