Fix the markup Errors on each page

[ajaygeorge]

This wouldn't be a high priority one.
But good to have, so that our pages are markup compliant.

http://validator.w3.org/check?uri=thelakshyafoundation.org

[saich]

Though this is a good-to-have thing, we must ensure we write compliant markup in all future checkins.

For existing code, I plan to do it in two steps:

1. Make the markup, as Transitional DocType header & fix those specific issues.
2. Then, fix the leftover 'strict' markup issues.

[ajaygeorge]

good. probably we should have a check while commiting code, to catch markup errors.