Fix command line options; don't copy assessment items
Fix command line options; don't copy assessment items

Fix the command line options do they don't error out.

Additionally, it's redundant to copy the assessment items. The windows installer
inlcuded the latest versioned set of items anyway. Just copy videos from prior
installations to the .kalite directory directly. This should both use less
disk space and make for a faster upgrade.

benjaoming/installers,learningequality/ka-lite-installers,ruimalheiro/installers,benjaoming/installers,learningequality/ka-lite-installers,mrpau/installers,mrpau/installers,mrpau/installers,learningequality/installers,learningequality/installers,mrpau/installers,ruimalheiro/installers,learningequality/installers,learningequality/ka-lite-installers,learningequality/ka-lite-installers,benjaoming/installers,benjaoming/installers,ruimalheiro/installers,learningequality/installers,ruimalheiro/installers