Skip common prefixes when searching through a row-store leaf page's
insert skiplist
Retry if releasing lock reduced nchunks. (#646)
Merge pull request #645 from wiredtiger/skiplist-common-prefix

Skip common key prefixes when searching through a skiplist.
Always retry the scan after an LSM cursor re-locks the tree.
In lsm_cursor.c, s/skip_chunks/live_chunks/ for clarity.
Switch LSM cursors to using the simplified realloc interface.
Only retry LSM cursor opens if the underlying tree has changed.
Merge pull request #647 from wiredtiger/lsm-retry

Retry if an LSM tree changed while the lock was dropped. (#646)
Fix a bug in LSM where we could evict a file while it was being used.

It could be used to create a bloom filter. The solution is to create
bloom filters using checkpoints, rather than open files.