Fix an off-by-one error in the transaction used for eviction.  We track the oldest ID that can *not* be written.
Don't preload the file system cache when compression is enabled.

Since we don't have easy access to the file offset for particular page
when applications are using compression.
Snapshots (including eviction) *should* include the last committed transaction.
Merge pull request #537 from wiredtiger/eviction-isolation

Fix an off-by-one error in the transaction used for eviction.
Only track whether eviction is stuck if the cache is full.
minor rephrasing so two patterns match
Merge branch 'develop' into file-extend
Change file_extend syntax from file_extend=(type=[data,log],size=XXX)
to file_extend=(data=XXX,log=XXX).

Add period testing of file_extend to test/format.