Make descriptions on homepage more meaningful

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>
Fix icon generation and app icon serving

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>
Customize title for app detail page and fix deprecated api cal

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>