Update documentation and ChangeLog

ChangeLog

@@ -1,3 +1,13 @@
+v0.5 (25/05/2017)
+** User **
+	Add --dry-run (-D) argument
+** 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
+	Add one more rule to robot detection : more than ten 404 pages viewed
+** Bugs **
+
+
 v0.4 (29/01/2017)
 ** User **
 	Remove crawlers from feed parsers

docs/main.md

@@ -11,7 +11,7 @@ Nevertheless, iwla is only focused on HTTP logs. It uses data (robots definition
 Usage
 -----
 
-    ./iwla [-c|--clean-output] [-i|--stdin] [-f FILE|--file FILE] [-d LOGLEVEL|--log-level LOGLEVEL] [-r|--reset year/month] [-z|--dont-compress] [-p]
+    ./iwla [-c|--clean-output] [-i|--stdin] [-f FILE|--file FILE] [-d LOGLEVEL|--log-level LOGLEVEL] [-r|--reset year/month] [-z|--dont-compress] [-p] [-D|--dry-run]
 
     -c : Clean output (database and HTML) before starting
     -i : Read data from stdin instead of conf.analyzed_filename
@@ -20,6 +20,7 @@ Usage
     -r : Reset analysis to a specific date (month/year)
     -z : Don't compress databases (bigger but faster, not  compatible with compressed databases)
     -p : Only generate display
+    -d : Dry run (don't write/update files to disk)
   
 Basic usage
 -----------