Add "proxy" mode: does't make the feed full-text

Useful for feedify (twitter, facebook, etc) and for bad written rss feeds in not-strong-enough news readers (eg. TPB on tt-rss). Uses "persistent" in Cache() so as not to empty the cache because of that (cause Cache() drops items not asked for).

morss.py

@@ -428,7 +428,7 @@ def Gather(url, cachePath, options):
 	log(url)
 
 	url = url.replace(' ', '%20')
-	cache = Cache(cachePath, url)
+	cache = Cache(cachePath, url, options.proxy)
 
 	log(cache._hash)
 
@@ -510,10 +510,12 @@ def Gather(url, cachePath, options):
 			item.remove()
 			continue
 		elif time.time() - startTime > MAX_TIME >= 0 or i+1 > MAX_ITEM > 0:
+			if not options.proxy:
 				if Fill(item, cache, url, True) is False:
 					item.remove()
 					continue
 		else:
+			if not options.proxy:
 				Fill(item, cache, url)
 
 		if item.desc and item.content: