* remarkable: remove unnecessary screen invalidate on resume
This is handled in uimanager if needsScreenRefreshAfterResume is enabled
(which is the default).
* remarkable: pass a path argument to reader.lua
Otherwise if lastfile is not set in the settings (e.g. install and then
exit without opening a file) koreader will just refuse to start.
* remarkable: pass koreader.sh args (if any) through to reader.lua