Fix Behavior.PluginDefaults

It should check that the library falls back to LCB_IO_OPS_SELECT
without libevent

Change-Id: I932a7b69c6c05bc86f6e82add5c1b8ba28c4d01d
Reviewed-on: http://review.couchbase.org/28452
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>
Update man pages regarding IO plugins

Change-Id: Iec67222ffd998c4cca4d106390265aed5aa13d19
Reviewed-on: http://review.couchbase.org/28447
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Matt Ingenthron <matt@couchbase.com>
[travis] Output tests results after the build

Also tag code with build number, because on clean environment, travis
fetches with depth 50

Change-Id: I7e46af68479e39a488a58150327ee3b785531a05
Reviewed-on: http://review.couchbase.org/28453
Reviewed-by: Matt Ingenthron <matt@couchbase.com>
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>