Signed-off-by: Ian Leonard <antonlacon@gmail.com>

 - rename packages from libdbi-drivers-* to libdbd-*
 - cleanup title & description
 - remove SQLite v2 driver
 - use PKG_INSTALL
 - add a BuildPlugin macro to package drivers
 - add license info
 - add myself as maintainer

Signed-off-by: Nicolas Thill <nico@openwrt.org>