Add "al" (apparent limit) param with value

Removes element from rss *after* treatment, useful for slow json API

morss.py

@@ -123,6 +123,9 @@ class ParseOptions:
 		else:
 			return False
 
+	def __contains__(self, key):
+		return self.options.__contains__(key)
+
 class Cache:
 	""" Light, error-prone caching system. """
 	def __init__(self, folder, key, persistent=False, dic=False):
@@ -587,6 +590,11 @@ def Gather(url, cachePath, options):
 			if not options.proxy:
 				Fill(item, cache, url)
 
+		if 'al' in options:
+			if i+1 > int(options.al):
+				item.remove()
+				return
+
 		if item.desc and item.content:
 			if options.clip:
 				item.content = item.desc + "<br/><br/><center>* * *</center><br/><br/>" + item.content