Add everyone listed with git log to CREDITS
Add everyone listed with git log to CREDITS

Change-Id: Iba0d2ccfbbb6e0b73df14c193d4c64854abd75fb
Reviewed-on: http://review.couchbase.org/20454
Reviewed-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

couchbase/php-ext-couchbase,couchbase/php-ext-couchbase,couchbase/php-ext-couchbase,couchbase/php-ext-couchbase,couchbase/php-ext-couchbase