latest commit to allow 'release' uploads

Release notes for numeric format, delete cylinders and change comment

Add two release note items and change comment in CHANGELOG.md file.

Signed-off-by: Stefan Fuchs <sfuchs@gmx.de>

Cloud storage proxy support: fix authenticated proxy on Windows

Based on feedback from the libgit2 developer when we asked about this problem
(libgit2/libgit2#4069) the type of proxy needs to be
set to AUTO in order for this to work.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

Add Derek control file

I want to start using Derek to check for Signed-off-by (or, more explicitly,
the DCO) in pull requests.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

Release tag for Subsurface 4.7.7

Release tag for Subsurface 4.7.6

Android build: make androiddeployqt less verbose

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

Fix build for cmake before 3.10

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

build/Travis: Android, use old Trusty

another try.

Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>

Switch to Subsurface-experimental branch for libdc

This requires a small change for serial_ftdi.c to build.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>