A few changes to the doc build system
A few changes to the doc build system

atulkum/flann,atulkum/flann,kyroskoh/flann,saedrna/flann,saedrna/flann,egtann/flann,egtann/flann,atulkum/flann,egtann/flann,kypp/flann,saedrna/flann,kyroskoh/flann,kypp/flann,atulkum/flann,kypp/flann,egtann/flann,kyroskoh/flann,kypp/flann,kyroskoh/flann,saedrna/flann,kypp/flann,saedrna/flann,atulkum/flann,saedrna/flann,kypp/flann,atulkum/flann,kyroskoh/flann,egtann/flann,egtann/flann