Update doc files (ChangeLog, README ...)

Update packaging
Change install prefix, come back to /usr

kc.1

@@ -2,7 +2,7 @@
 .\" First parameter, NAME, should be all caps
 .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 .\" other parameters are allowed: see man(7), man(1)
-.TH KC 1 "February 26, 2011"
+.TH KC 1 "February 27, 2012"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -26,9 +26,9 @@ KissCount is a personal accounting software. Its goal is to be as simple as poss
 It focuses on PERSONAL accounting (not companies/associations). You only have to enter operations and see what you have (or not).
 .TP
 .B bdd_file
-Choose another database file than ~/.kisscount/kc.bdd
+Choose another database file than ~/.local/share/kisscount/kc.bdd
 .SH FILES
-Default database is ~/.kisscount/kc.bdd
+Default database is ~/.local/share/kisscount/kc.bdd
 .SH AUTHOR
 KissCount was written by <Grégory Soutadé>.
 .PP