Add header section to RPC description file.

Make stealing from other threads more frequent and adjust sleep
frequency.
update gperftools-testharness.sh
style fixes in yapps
fix indent spacing
ShortLock -> SpinLock; LongLock -> Mutex
minor updates
Merge branch 'master' of https://github.com/rjpower/simple-rpc into rjpower-master

Conflicts:
	rpc/utils.cc
no need to strip to test for %% markers
minor update
formatting code
minor fix
more tests