For OSX travis builds:
Since recently, brew install --c++11 stops the build.
Error: invalid option: --c++11
The command "./.ci/install-deps.sh" failed and exited with 1 during .
Your build has been stopped.

* .ci/install-deps.sh: Install script for dependencies.

* .travis.yml: Adding support for gcc 8,7,6,default and xcode 8.3,9.2,default.

* .ci/install-deps.sh: Addin libsystemd-dev, opus and portaudio-dev.

* .travis.yml: Removing install script covered package installations. Adding branch whitelist for all branches.

* .ci/install-deps.sh: Adding executable bit.

* ci/install-deps.sh: Moving to non-hidden directory to make execution less painful.

* .travis.yml: Properly moving install script to hiddend directory.

* .ci/install-deps.sh: Changing to trusty names for libraries and development packages.

* .ci/install-deps.sh: Adding systemd, dbus and eigen3.

* .ci/install-deps.sh: Adding libsystemd0,libopus-dev, libportaudio2.

* .ci/install-deps.sh: Installing random systemd packages in the hopes they are the right ones... fuck yeah, ubuntu packaging hell.

* .travis.yml: Setting build and install operations to verbose.

* .ci/install-deps.sh: Install script for dependencies.

* .travis.yml: Adding support for gcc 8,7,6,default and xcode 8.3,9.2,default.

* .ci/install-deps.sh: Addin libsystemd-dev, opus and portaudio-dev.

* .travis.yml: Removing install script covered package installations. Adding branch whitelist for all branches.

* .ci/install-deps.sh: Adding executable bit.

* ci/install-deps.sh: Moving to non-hidden directory to make execution less painful.

* .travis.yml: Properly moving install script to hiddend directory.

* .ci/install-deps.sh: Changing to trusty names for libraries and development packages.

* .ci/install-deps.sh: Adding systemd, dbus and eigen3.

* .ci/install-deps.sh: Adding libsystemd0,libopus-dev, libportaudio2.

* .ci/install-deps.sh: Installing random systemd packages in the hopes they are the right ones... fuck yeah, ubuntu packaging hell.

* .travis.yml: Setting build and install operations to verbose.

* .ci/install-deps.sh: Adding berkeley db.

* .travis.yml: Using default prefix on Linux (installing to /usr fails on travis - probably already installed).

* .travis.yml: Adding back /usr prefix and adding sudo to install call.

* README.rst: Adding initial version of a rst based README (only introduction and build information).

* README.rst: Adding link to website in title. Fixing resource type to be image for build status image.
Fixing sub bullet lists.

* README.rst: Fixing bullet lists according to rst spec.

* .travis.yml: Adding hacks for building with gcc on macOS.

* .travis.yml: Adding missing envs and compiler types to macOS builds.

* .ci/install-deps.sh: Fixing name of package portaudio19-dev.

* .travis.yml: Adding comments to default gcc/clang versions. Unifying call to brew update with removal of custom c++ executable.

* .ci/install-deps.sh: Adding install of gcc versions on macOS depending on CC variable.

* .travis.yml: Removing installation of gcc from matrix setup (the local c++ executable has to be removed first).

* .ci/install-deps.sh: Install the right gcc formula using brew.

* .travis.yml: Also set CXX to gcc6, if CC is set to it.

* .travis.yml: Removing disabling of options (they will be disabled automatically, if not available).

* .travis.yml: Looking at what we're deleting in /usr/local/include/c++.

* .travis.yml: Uninstalling oclint, if it's installed, as it conflicts with gcc.

* .travis.yml: Test what removal of include-fixed stdio.h will do (otherwise there's a broken include of a _stdio.h).

* .travis.yml: Creating one-liner for header removal, adding ; to configure.

* .travis.yml: Fixing indent. Adding ; for one-liner.

* .travis.yml: Moving to xcode9.2 image for testing, as the stdio.h issue seems xcode related (probably a bug with 9.4). Removing header removal.

* .travis.yml: Adding -flax-vector-conversions to CXXFLAGS to fix vector conversion problems.

* .travis.yml: Trying xcode8.3 with the build in the hopes that CoreAudio will behave more nicely.

* .travis.yml: Moving to clang for all OSX based builds for now, as brew installed gcc proves to be very complicated.

* .travis.yml: Removing support for Xcode 7.3. That stuff is too old.