Update of the Serbian translation

Change-Id: If244aabe80414cc0202f3d18c0d0defc6b0c47bf
Reviewed-on: http://gerrit.rockbox.org/1016
Reviewed-by: Michael Giacomelli <giac2000@hotmail.com>
Enable battery charging detection for iBasso DX50/DX90.

This changes iBasso DX50/DX90 config from CHARGING_SIMPLE (Simple, hardware
controlled charging (CPU cannot read charger state but may read when power is
plugged-in) to CHARGING_MONITOR (Hardware controlled charging with monitoring
(CPU is able to read HW charging state and when power is plugged-in)).

Not really usefull at the moment, since USB connection (charging) is not (yet)
gracefully handled for iBasso devices.

Change-Id: I55da81b10637d4de88d713ea5eba08eb59bc629f
Reviewed-on: http://gerrit.rockbox.org/1010
Reviewed-by: Michael Giacomelli <giac2000@hotmail.com>
atj213x: e100/150 lcd test binary

Change-Id: I3f9fa21dcb33d1cd3081d0c995adfb44e085dd7a
YH820/YH92X: Improve some keymaps for plugins.

Change-Id: Ib598737327043809f60127f7c538f2d45ddabb87
Rockboy plugin: remove second keymap definition for the Iriver H10, added in
594b6e2 (FS#10251).

Change-Id: I652545c812a8bd4d5d1be5f200fce9c97733b636
YH820/YH92X: Add missing StdMenu action.

Change-Id: Ife5be1b6427724b5c231e0035aca44373adb0e40
Manual for the Samsung YH920/YH925.

Change-Id: I2db0023cae585e9c9517da9ed2e9de6195081ce2
Pegbox: use the same keymap for Samsung YH820 and YH920.

Keymap for the YH820 fits much better for the YH920 anyway.

Change-Id: I54d7f3be9dfaf689e76c73d39da4649395e912a1
Manual for the Samsung YH820.

Change-Id: I1c760b4846963f39b9df60413ffbb9f95dc0e0fb
Manual: add missing actions in Sokoban for the Packard Bell Vibe 500.

Change-Id: I73d7bffaf5a31cab7ab5fcb07ff68d273b9665e0
atjbootool: fix date printing

Change-Id: If5cd0d79e4afb12224932b24c63b016636c7a56e