tlp-stat: fix threshold output trailing empty line.
Fix #41: postinst/postrm fails without acpid (Petit Carlin)
 - recommends: acpid
 - postinst/rm: ignore missing acpid
Merge branch 'master' into devel

postinst/postrm: handle all states correctly.

Conflicts:
	debian/changelog
	debian/tlp.postinst
	debian/tlp.postrm
tpacpi-bat: merge upstream w/ support for ThinkPad (Edge) S430.
Fix issue #14: tlp recalibrate fails when /bin/sh -> bash (slyon)
Set more reasonable values for dirty_ratio/dirty_background_ratio (same as in pm-utils).
Subtract offset 128 when reading thresholds of ThinkPad Edge S430.
Show /sys/class/power_supply/BATx/cycle_count = 0 as "(unsupported)".
Fix #42: X121e battery functions not working (Jlp)
 - bat_exists(): check via /sys/devices/platform/smapi/BATx first, /sys/class/power_supply/BATx second
tpacpi-bat: add support for ThinkPad L520 (user input), L530, L420 (guess).
set_charge_thresholds(): reverse order of writing the thresholds upon system start
    to stop - start, to achieve a consistent tlp-stat output between
    tlp init/start and tlp setcharge on quirky Edge and L series.
tpacpi-bat: remove L420/L520, proved not to work.
*** 0.3.9 Release ***