ARELLE-284: web cache features:
(1) --internetRecheck weekly(default), daily, never
(2) --internetLogDownloads provides download logging, required
reworking all logging messages and assigning message codes in webCache
(3) if a download fails due to recheck, provide info message but
continue operation with prior file contents
package manager updates
ARELLE-286 mavericks fix
ARELLE-284, webCache messages update