wxg 优化了气泡长度 修复6485 bug
Merge branch 'master' of https://github.com/jiangzhen1984/V2TechConferenceClient

Conflicts:
	source/res/layout/message_body_file_item.xml
	source/res/values-hdpi/dimens.xml
	source/res/values-sw480dp/dimens.xml
	source/res/values-sw720dp/dimens.xml
	source/res/values-xhdpi/dimens.xml
	source/res/values-xxhdpi/dimens.xml
	source/src/com/v2tech/view/conversation/MessageBodyView.java