* clean up error handling: show Exception info
* white space fixes
* clean up output when creating CL
* simplify hg change command; add hg file
* fix stale cookie bug (thanks iant)
* in LoadAllCL, load each CL in a different thread,
to parallelize the slow web fetches
* throw away support for Mercurial before version 1.3
* add @CL-number file pattern for commands like diff
* make hg sync show files being sync'ed
R=r
http://go/go-review/1016016
The master copy is going to live elsewhere,
but weAPOSTROPHEll keep a copy in the Go tree so that
developers donAPOSTROPHEt have to check out two
different repositories.
R=r
CC=go-dev
http://go/go-review/1012006
