A weird hack to overcome the unaccessible kind of locked osm_base_version file
by dispatcher and wich cause munin to randomly fail to get a content from that file, munin will now fetch the copy, and should stop going weird

Conflicts:

	munin/osm_replication_lag-api
remove unused comments
quick readme to explain what this script do with munin
Merge pull request #32 from osm-fr/pr-for-drolbr

Adding delay monitoring for munin