Improve responsive layout font sizes

Change font sizes based on suggestion from @debloper

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>
Change URL to github repo in footer link

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>
Merge pull request #9 from kaustavdm/prerelease_fixes

Change URL to github repo in footer link
Merge pull request #8 from kaustavdm/responsive_fixes

Improve responsive layout font sizes