1. all log messages will be terminated with \n, whether the user provided
it or not.
2. remove a bunch of print() calls from scripts to reduce clutter
3. replace printf calls with log_* calls to reduce clutter
4. add the new release preview script
At this time, only E2 is working.
Fixing a lot of old code (monster is no longer id 0).
package.paths configured from eressea.ini
install directory configured from eressea.ini
moving building_action into a seaprate module (it's deprecated)
