Added further documentation on the sfx2 framework.
Turned the packed odg file into a git-friendly html+svg file.

Change-Id: I0b86f00ffb9355d4cbc911a7b406b1b76dbf62ac
Signed-off-by: Lennard Wasserthal <Wasserthal@nefkom.net>
Reviewed-on: https://gerrit.libreoffice.org/3871Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Tested-by: Norbert Thiebaud <nthiebaud@gmail.com>