release i3 4.9.1

release i3 v4.9

release v4.8

add release notes for 4.7.2

add release notes for 4.7.1, update manpage version

add release notes for v4.7

add release notes for v4.6

add release notes for v4.5.1

makefile: delete test.{config_parser,commands_parser} in distclean

update debian packaging for 4.4