1.解决文档共享一些存在的bug

Conflicts:
	source/res/layout/video_doc_layout.xml
	source/src/com/v2tech/view/conference/ConferenceActivity.java
	source/src/com/v2tech/view/conference/VideoDocLayout.java
	source/src/com/v2tech/vo/V2Doc.java
1.删除不合适的图片