Make max. number of calculated occurrences configurable

[axunonb]

Replace the constant _maxIncrementCount with a configurable variable
Note: The default should be "Infinite", but for occurences without an end date a limitation can be useful

ical.net/Ical.Net/Evaluation/RecurrencePatternEvaluator.cs

Lines 49 to 52 in 95bbc53

	public class RecurrencePatternEvaluator : Evaluator
	{
	private const int _maxIncrementCount = 1000;