Log Message:
Changes 1.9.2:
   * GSMime parsing ignores extraneous data
   * New log functions GSOnceFlag and GSOnceMLog
   * New class NSError
   * Multiple new function in GSObjCRuntime
   * NSProtocolChecker rewritten
   * autogsdoc support added for building frames
   * Binary incompatibility:  NSUnarchiver, GSIMapTable have new ivars added