renamed RawPackageInfo to BufferedPackageInfo
added the IDisposible interface for the AppDomainBootstrap
replaced  *RequestInfo with *PackageInfo; and allow commands' keys are generic;
improved the code about BufferPackageInfo's buffer returning
added help extension method for BufferListStream reusing
fixed the bug the BufferState Pool was always not initialized which led to the failure of secure communication
added the GlobalAssembly file for the project ProtoBase
fixed a bug that subscribing an event by mistake, the original purpose was to unsubscribe it
fixed an exception when collect a server's status but it has been stopped
fixed a typo in the listener stopped message
improved the build task file
Merge pull request #18 from kerryjiang/master

update master