完成抓取模块与判重模块合并  但编码问题浮现
Merge remote-tracking branch 'origin/develop' into oubeichen

Conflicts:
	.settings/org.eclipse.core.resources.prefs
	src/similarity_judge/Similarity_Judgement.java
改进提取摘要的方法  但对百度文库等少数链接抓取仍无能为力。
Clean Up
Merge remote-tracking branch 'origin/daniel' into oubeichen

Conflicts:
	reference_jar/commons-httpclient-3.1/docs/apidocs/org/apache/commons/httpclient/HttpConnection.html
	reference_jar/commons-httpclient-3.1/docs/apidocs/org/apache/commons/httpclient/util/ParameterFormatter.html
	src/crawl/Search_engine_process.java
Exception Handle