Fix API documentation comments

Removed blank lines between Parameters/Returns heading and their tables
Changed API documentation header and footer
Added None below Parameters & Returns where applicable
Open-webOS-DCO-1.0-Signed-off-by: Kalindi Pathare <kalindi.pathare@lge.com>

Change-Id: Ia3844ca9b8c95ba9e697237d8d199dd41e4e442a
Reviewed-on: https://g2g.palm.com/2735
Reviewed-by: Build Verification
Reviewed-by: Keith Derrick <keith.derrick@lge.com>
Tested-by: Keith Derrick <keith.derrick@lge.com>