1.3.0 has been released. master now represents the current state of
development towards the next feature release 1.4.0.
Bugfixes for 1.3 will happen in the 1.3.x branch.
Compared to earlier version bumps we bump a lot more files because of
we produce more artifacts; overlay process, dll and exe split, etc.
This should have happened right after the 1.3.x branch was split off.
This commit adds a theme called "Classic - Old Style", which is simply a set of icons for the system's theme (used when "None" is selected).
Those icons are the ones we had for "None" until 7bf387de8c.
Adds the Mumble theme as a submodule and ensures it is built
into the binary itself as a resource. Also changes the default
configuration to select the Mumble theme in it's Lite style
as the default. Whether we go with lite or dark in the end we'll
want to select a Metro Mumble style as the default. This will allow
us to always switch to the other without restart because they use
the same icons.
