repo 1.6.8.4

1. 54fccd7 Document any crashes from the user's text editor by Shawn O. Pearce · Wed Jun 24 07:09:51 2009 -0700 v1.6.8.4
2. 559b846 Report better errors when a project revision is invalid by Shawn O. Pearce · Mon Mar 02 12:56:08 2009 -0800
3. c9ef744 Install a default pre-auto-gc hook in all repositories by Shawn O. Pearce · Mon Nov 03 10:32:09 2008 -0800
4. cf31fe9 Initial Contribution by The Android Open Source Project · Tue Oct 21 07:00:00 2008 -0700 v1.0