allow remove_all for mbtiles cleanups (fixes #116)
improve combining of multiple cascaded sources

pass supported_srs and supported_format to combined layer so that the
next layer with same parameters can be combined.
ignore different res_ranges, layers should already be filtered.
use extent from layer metadata in WMTS capabilities (fixes #115)
keep custom query parameters when sending req in mapproxy-util wms-capabilities
set logging to debug in serve-develop with --debug option
include wmsparse package
use wmsparse package
add new `mapproxy-util config` tool
add documentation for mapproxy-util config
renamed napproxy-util config to autoconfig
fixed python 2.5 compat
import from vendorized wmsparse package
fixed python 2.5 compat
respect order of --seed/--cleanup tasks
document --use-cache-lock