Release candidate for 0.13.0

Test if OSX deploy still works

Bugfix release

Bugfix release

Most notably, this release fixes a potential core crash caused
by clients sending invalid handshake data.

Bugfix release

Bugfix release

This release fixes the database not reinitializing its session if
PostgreSQL is restarted while the core is running.

Bugfix release

Backporting importing fixes from 0.12.x

Start of the 0.13 cycle

Bugfix release

This is an emergency release fixing the wrong timezone being
used when writing backlog to PostgreSQL databases, due to a behavior
change in Qt5's psql driver.

Feature release

This release brings full support for KDE Frameworks, an improved hashing
algorithm for core passwords, the ability to remotely change your core
password, as well as many bugfixes and improvements.