Improving the at_least_x rules on the config files

[Bernardo-MG]

The at_least_one and at_least_two modifiers should work in some other way. Probably an at_least(x) modifier, where x is the minimum number of apparitions.

[Bernardo-MG]

Now it works this way:

The rule is at_least_n, where the n is a positive integer. It will be taken from the modifier and applied to the rule.