Add a new library: libcouchbase_debug.so (see include/libcouchbase/debug.h) which is a new library that contains new debug functionality.

Added manual pages for the library.

Observe malfunctions in the case of multiple keys and server failure.

Issues: CCBC-155

Reset internal state on lcb_connect(). Allow caller to use lcb_connect() multiple times to implement reconnecting using the same lcb_t instance. Also it sets up the initial-connection timer for users who don't use lcb_wait() and drive IO loop manually.

Issues: CCBC-153

Invalid read in libevent plugin, when the plugin compiled in 1.x mode

Issues: CCBC-171

Shrink internal lookup tables (and reduce the size of lcb_t)

Issues: CCBC-156