Revert "add mock login module"

This reverts commit 6f493900689d0701b63fe9c16b4c4fff8cd93cad.
rewrite crawl logic & Merge remote-tracking branch 'origin/master'

Conflicts:
	resources/crawler4j.properties
	src/edu/uci/ics/crawler4j/fetcher/PageFetcher.java
	src/edu/uci/ics/crawler4j/snapshot/SnapshotCrawlController.java
	src/edu/uci/ics/crawler4j/util/Config.java