v0.5 (15/04/2020)
** User **
	Add --dry-run (-D) argument
	Add more rules for robot detection :
		More than ten 404 pages viewed
		No page and no Hit
		Pages without hit
	New format for (not_)viewed pages/hits and bandwidth that are now recorded by day (in a dictionnary were only element 0 is initialized). Element 0 is the total. WARNING : not backward compatible with previous databases.
	Sync data with awstat (develop branch : 7.7+)
	Make backup before compressing (low memory servers)
	Add top_pages_diff plugin
	Add IP exclusion feature
** Dev **
	Use cPickle instead of pickle
	Don't save all robots requests (only first pass is kept) which allow to save a large amount of memory/disk space
	Handle URLs with empty referer
	Don't try to find search engine on robots
** Bugs **
	Fix KeyError : geo attribute can not exists
	Call post hook plugins even in display only mode

v0.4 (29/01/2017)
** User **
	Remove crawlers from feed parsers
	Add display only switch (-p)
	Add robot bandwidth display plugin
** Dev **
** Bugs **
	for robots, we have to use not_viewed_pages (feeds plugin)
	gz files were not generated due to bad time comparison
	Database compression could lead to altered files

v0.3 (12/04/2016)
** User **
	Add referers_diff display plugin
	Add year statistics in month details
	Add analysis duration
	Add browsers detection
	Add operating systems detection
	Add track users plugin
	Add feeds plugin
	Add _append feature to conf.py
	Add hours_stats plugin
	Add display/top_downloads_diff plugin
	Can specify multiple files to analyze
	Add reset feature
	Add gz files support
	Add -z option (don't compress databases)
	Add own search enfines files
	Do reverse DNS on feeds parsers
	Add IPToGeo plugin

** Dev **
	Add istats_diff interface
	Sort documentation output
	Add debug traces in robots plugin
	Update awstats data
	Remove double slashes at the end of URL
	Remove final slashes for referrers
	Add alt attribute for all img tag

** Bugs **
	Forgot <body> tag
	Bad UTC time computation
	Hits/pages in the same second were not analyzed
	Last day of month was skipped