1.1.1 2016/10/30 BUG
* When Gyoto is configured to be installed in another prefix than
/usr/local/, look into two additional directories when loading
plug-ins: /usr/local/lib/gyoto/<sovers>/ and
/usr/local/lib/gyoto/.
* The name of the versioned directories for plug-ins (<sovers>
above) is now the major version of the library, so users don't
need to reinstall there plug-ins when ugrading Gyoto to a
binary-compatible release.
* --enable-hardening now also enables -fPIE.
* Yorick: actually implement `picture' painter for the matte_paint
framework. Allow using any two or three-dimensional image or
stack of images in the `picture' and `panorama' painters.
* Include minimal plug-in example in plugins/null/.