Have configure check for header and library when bzip is enabled.
AC_CHECK_LIB requires a second argument, a function to test for.
Simplify the autoconf that checks for bzip2 headers/libraries.

Pull the header/library checks outside of the existing AC_MSG_XX
conditionals, otherwise the autoconf output gets messy.

Add matching checks for the snappy headers/libraries.
whitespace cleanup
Merge pull request #522 from wiredtiger/bzip_configure

Have configure check for header and library when bzip and/or snappy are enabled.
Disable a heuristic used in LRU eviction if we get stuck.  With tiny caches and many threads, we can be really unlucky and skip over the only evictable page(s) in cache.
clses #517
Limit the size of pages created when merging split merge trees.
Tidy previous commit to at use a define around the magic number.
Add a header file I forgot in the last commit :(
Allow unquoted config values that include slashes.
Merge branch 'develop' into lsm_stats