todo: more items.

doc/TODO.txt

@@ -1,4 +1,9 @@
 []
+- optimization: merge the two git-rev-list commands and use python instead of shell while loop
+	- %at %an, remove %H & grep -v
+- BUG linux-2.6 repository
+	- git-log --pretty=format:"%at %an" |grep -C3 unknown
+	- git-rev-list (for number of files in each revision) says "Warning: failed to parse line "<unknown> 17741"
 
 [Bugs]
 - Graphs: vertical x labels get cut off
@@ -14,6 +19,8 @@
 - Commandline options
 	--title "Project name"
 	--debug / --verbose
+- state saving/restoring?
+	- could save data that can not be recreated quickly (for example files/lines data)
 
 [Stats]
 - Activity by Time?