added layer to releasenotes
Merge pull request #1031 from geoadmin/releasenotes_20140925

added layer to releasenotes
Extension of mapproxy to support new projections,
layers and services (WMTS)
updating for DB table change and new cleanup up apache entries
correcting mapproxy according to feedback:

- improving documentation and README for mapproxy
- removing OSM layers from config
- coping with empty parts in template
- adding missing projections in WMS
- 'default' rewrite rule for all environnment
- optimized apache settings
- only requesting the needed WMTS tiles
- IGN performance optimization
Redesign: all available timestamps, but not use of keyword 'current'