use name of tile layer in tile authorization

fixes issues when the requested layer name differs from the
actual layer name (e.g. test_EPSG900913 -> test)
Merge branch '1.5.x'
Fix invalid YAML example
Merge pull request #58 from drnextgis/master

Fix invalid YAML example
allow int and float values as default dimension values
use last dimension value as default
Merge branch 'master' of github.com:mapproxy/mapproxy
removed old code
fixed typo
removed comment from wmts capabilities template
add ServiceMetadataURL to RESTful WMTS capabilities
Merge pull request #62 from quiqua/typo_doc

fixed typo in docs
Merge pull request #61 from quiqua/old_cfgdata

removed jython related options from setup.cfg
allow HTTP_X_FORWARDED_HOST to be a list
Merge remote-tracking branch 'mapproxy/master'
fixed .kml docs for caches with origin nw
Merge remote-tracking branch 'upstream/master'