bumped to opencart@16dec

Signed-off-by: Vadim A. Misbakh-Soloviov <mva@mva.name>
bump to a9763f4eafe9f57db50a02b84dc5a925bbd63c16@OpenCart (1.5.5.1) + added few modules

Signed-off-by: Vadim A. Misbakh-Soloviov <mva@mva.name>