NEW: added logger to policy results
NEW: module to calculate statistics from RSS information
FIX: removed legacy methods ( from former RSSCache )
FIX: removed option to disable logging in database
FIX: added logger for policies and new table for Policies Logs
fIX: removed unused code
FIX: more verbose comment
FIX: cosmetic change
FIX: fixed broken dirac-rss-set-token script
FIX: added ResourceManagementDB to the script
NEW: updated SiteStatus to use RSSCache
NEW: RSSCacheNoThread renamed to RSSCache ( and deleted former one ),
new SiteStatus helper. Internal representation of CE as ComputingElement
CHANGE: getBannedSites now returns directly the list of banned sites

Instead of getting all the sites then filtering out those that are not
in the mask, directly get from the DB the Banned sites. Now
AllowedInSiteMask + BannedSites != total sites

CHANGE: Don't check if the site is in the SiteMask already, just set
the status.
FIX: documentation of banSiteFromMask

Fixes #294.
FIX: Doc

Site must be a string
FIX: addFile bug
NEW: upgraded Status helpers to have the same signature
NEW: ported method from ResourceStatus, so that can be reused
NEW: base class for the Status helpers of RSS
NEW: Listing of metadata sets
NEW: handler call for listing of metadata sets