Added NPC actions so that it now closes doors after opening them.
Fixed rotations for opening/closing doors and for reaching the goal point.
Added full support to cottages mod gates and half doors.
WIP: Support for cottages beds and sleeping mats.
Pathfinding: Adds functions that allows to map the Minetest 3D map to a 2D array to use by the pathfinding algorithm.
Actions: Use new code for find_path function. Improves door opening while walking on paths, and also now close them. Cottages fence gates and doors are also now supported in addition to the default doors and gates.
Changes to the Readme and the License.
Places: Added functions for adding and getting places, and for finding places of specific types. Added beds, chairs and chest as places.
NPC: Added places map and action queue.
Moved trading and pricing code to another folder, separate files.
NPC: Added further inventory functionality.
Trading: Added price data structure, which allows for setting prices for items. Also includes some default definitions.
Modified NPCs so random dialogues are chosen on initialization.
Added function to start a dialogue, choosing randomly NPCs dialogues.
Changed NPC code to use new dialogue code
