Rename the log "user bytes" statistic to "payload bytes".  The former has confused a few people, I hope the new wording is clearer.
Add upgrading notes.
Fix LSM trees with custom collators: use the same customize path as for btrees.

refs #1361
Fix custom collators with LSM (and other non-btree sources): don't assume there is a data handle in the session.
Merge pull request #1366 from wiredtiger/collator-config

Fix LSM trees with custom collators: use the same customize path as for btrees
Add the additional arguments for the custom collator support.
Fix a typo, change directory before checking out a branch.
Add tools/3rdparty to the list of directories we skip when checking
copyright notices.
Add minor additional wording as part of adding NVD3 to the tree.
Fix duplicate section labels, fix renamed name.
Merge pull request #1362 from wiredtiger/log-bytes-payload

Rename the log "user bytes" statistic to "payload bytes"
Typo.