This CEF is based on Chromium 51, which drops support for Windows
Vista.
CEF now has builds hosted by Spotify that can be downloaded
automatically, so the build process has been updated to automate
downloading and building the CEF dependency. The version of CMake
in Ubuntu 12.04 doesn't support the URL_HASH parameter, so use a
more recent version from a PPA.
Unfortunately the minimal build's CMake config is broken
(https://bitbucket.org/chromiumembedded/cef/issues/1921) so for now
LOOT downloads the standard build (which is a much larger download).
The CEF dependency is not resolved using CMake because it's only
available behind a CAPTCHA, and the Boost dependency is not resolved
using CMake because it is a relatively large dependency that is better
shared between LOOT and its dependencies that use it, instead of each
having to build a separate copy.
This is slower than the existing Travis script, because all targets in
the dependencies are now built, but it is more portable.
Not all Windows-specific code has equivalent Linux code, file path to
URL conversion is hacky, and only that LOOT launches correctly with no
game detected has been tested.