Add C-interface to boost::timer

Signed-off-by: Christoph Höger <christoph.hoeger@tu-berlin.de>
Ad yet another test case

Signed-off-by: Christoph Höger <christoph.hoeger@tu-berlin.de>
Add vector of changed rows

Signed-off-by: Christoph Höger <christoph.hoeger@tu-berlin.de>
Add timer to compiled files

Signed-off-by: Christoph Höger <christoph.hoeger@tu-berlin.de>
use timer in example

Signed-off-by: Christoph Höger <christoph.hoeger@tu-berlin.de>