gameplay improvements
=====================

* infinite unit selection
* more than 10 groups -> grouping prefixes
* intelligent work/attack searching
** search for action near here
** do action exactly here
* setting for default attack mode for all/each units
* move group alltogether OR move eacht unit by its speed
* better regrouping
** intelligent assigning of new units to existing groups
** sub-group-selections
* player boosts or handycaps
* no-rush enforcement as game setting
* better pathfinding and blocking resolution
* customizable hotkeys for everything
