Update for 2.19.x OSS

Squashed commit of the following:

commit 5ea7d0b6ae9d412d8cbfd9a67b9a4b9efa9e61d9
Author: Steven Breitstein <sbreitstein@bloomberg.net>
Date:   Wed Oct 9 16:21:56 2013 -0400

    Update for 2.19.x OSS (removed files).

commit 4ab1021a217a81b35ddee8a70ec23ab95e2d0f72
Author: Steven Breitstein <sbreitstein@bloomberg.net>
Date:   Wed Oct 9 16:19:37 2013 -0400

    Update for 2.19.x OSS (modified files).

commit dfe4da4653c0570df944a5bd56d8f40d858d83c7
Author: Steven Breitstein <sbreitstein@bloomberg.net>
Date:   Wed Oct 9 16:17:08 2013 -0400

    Update for 2.19.x OSS.
Import new doxygen pages from bde_api_2.19_Oss2b
Update BDL content from bde_api_2.19_Oss2b
Update 'doxygen' pages for BDE 2.20.x.
Update documentation to BDE 2.22.1.2