Multiple set layers for Automapping at tiled-qt

maindescription.txt

This describes an approach how to make different named set layers work for Automapping.

As of now the layers in Automapping are all prefixed with "rule" which is just redundancy.
Therefore the prefixing will be split up into several different prefixes to exactly
indicate which function is assumed at a layer. Having the prefixes all different the detection of the assumed function of that layer is easier than before.

There will be

"regions" which is the prior "RuleRegions" describing the region which 
          is considered to be a rule.

"output<xxx>_<yyy>" which is the prior "Rule<xxx>_<yyy>" which describes the output 
                    when applying such a rule.
                    <yyy> is describing in which layer the given output should be directed.
                    <xxx> can be different indexes accross different layers.
                          This makes random output possible.

"rule_<xxx>" which is the prior "ruleset". Now you can name the layer at position <xxx>

"rulenot_<xxx>" which is the prior "rulenotset". here as well you can name 
                the layer at <xxx>