Util Script

Create a new Util Script which contains conversion functions (Can be
used later for storing common utility functions), made changes in
manifest.json and options.html to include this script in all content
scripts and also options script. Remove conversion functions from
options script
Border color in RGBA instead of hex

Using ulity function hexToRGB, convert color to RGbB and add custom
alpha
Commented out console logs

These were meant just for debugging purposes.