Merge branch 'develop-olympus' into develop-ascraeus
* develop-olympus:
[develop-olympus] Increment version number to 3.0.14-dev.
[develop-olympus] Add changelog for 3.0.13 release.
[develop-olympus] Bump version numbers for 3.0.13-RC1 release.
[develop-olympus] Bumping version numbers to final for 3.0.13 releases.
[ticket/13534] Set imagick path to empty string to prevent failing path check
The imagick path defaults to /usr/bin. If it doesn't exist for some reason,
for example on travis, the form won't be submitted and the settings won't be
changed.