Alpha 13 dev-2699

Bug Fixes

 * Fixed idle hearthling problem where hearthlings would refuse to mine or build a structure.
 * Fixed engine error when spawning camps in some locations.
 * Fixed false positives for Lavasoft crashes.

Other Changes

 * Increase experience gain for the Shepherd. Feeding animals now also grants experience.
 * Added tooltips to resources in the building designer.
 * Improved placement of decorative items on ledges.