Replace do_make with enhanced perl version
Add "pessimistic" locking functions in README
Replace libcouchbase_ operations in multi with lcb_

Still need to re-work the async mechanism, which needs some more work
Make single and multi args follow the same codepath
Add heading for view methods (docs)
do_make script's -w flag should also append -ggdb3 to CC
Split 'VALGRIND' variable