bump target SDK version to android-19 (4.4.2) KitKat
add 0.4.5 changes to the ChangeLog
update to build a wider range of recent NDKs (use gcc 4.6)
update translations: da de es fr nl zh_CN
update transifex mappings sl_SI -> values-sl and pt_BR -> values-pt
try new tricks for getting sdcard path on Android 4.3/4.4 and newer

They've messed up the sdcard path even more since 4.2.2, we need even more
silly tricks!

fixes #66
fixes #82
fixes #81
run native setup in Application subclass to ensure its always run first

The android.app.Application instance associated with the app is always
launched first, so its the natural place to run the native setup.  This
fixes crashes that happen if the InstallLog was the last Activity viewed,
then the app gets killed and relaunched.  Before, it would launch and go
straight to InstallLogViewActivity and never run the native setup.

Most of the code in NativeHelper should probably be moved to
LilDebiApplication.
in Terminal Emulator is installed, add menu item to launch Debian shell

Thanks to Alexander-- for the key inspiration and research.

closes #76