WebView Feature and bug fixes

some minor bug fixes with saving settings
added webview to show rich html text with some enhancments with
javascript
added richText mode and Light text mode with updates
and in settings
fix when pull and open update the async task
not find the activity not added
if(isAdded) solves the problem
prepare it for publishing with technion server to upload it to play
store
adding functionalty when new semester is opens so tutors and workshops
will be deleted and redownload new ones