Remove unused statistics config.  Other minor doc edits. #397
Merge pull request #402 from wiredtiger/doc_mods1

Remove unused statistics config.  Other minor doc edits. #397
Minor changes to fix uri table display. #397
Merge pull request #403 from wiredtiger/doc_mods1

Minor changes to fix uri table display. #397
Add check for any calls to strtouq. #390
Merge pull request #404 from wiredtiger/strtouq

Add check for any calls to strtouq. #390
Add checkpoint and update threads to wtbench (ex_test_perf).
Tidy and enhance output from wtperf.
Change __wt_cond_wait and __wt_cond_signal to return error values,
instead of aborting.
Don't unlock the LSM lock unless we first locked it.
Don't unlock the LSM tree twice if __wt_metadata_remove() fails for any
reason.
Don't unlock the LSM tree repeatedly if __wt_lsm_meta_write or
__wt_metadata_remove fails.
Change __wt_readlock, __wt_try_writelock, __wt_writelock, __wt_rwunlock
and __wt_rwlock_destroy to return errors rather than abort in place.
Replace the row-key-serial function with CAS instruction.
When __wt_txn_read_{last,first} were removed from TXN_API_END, the
comment needed to be updated.
typo
We document the key-gap can be set to 0 (which makes logical sense, a gap of
0 would mean fill in all the keys).  Don't let it drop core.
Add a few additional configuration items knobs to test/format:
internal_key_truncation, key_gap and split_pct, weren't getting tested.
Clarify the format type name.
The name "population" is used too much, it's confusing, use "mytable"
for the table name.