DEV: doctype changed to html5, and elements migrated to html5

1. doctype changed
2. meta tag changed
3. <link /> changed to <link > as required by html5
MAINT: unnecessary javascript removed
BUG: jQuery should be loaded before boostrap.min.js

bootstrap.min.js uses jquery and thus should be loaded first
MAINT: html element attr removed - no need in html5
MAINT: jquery-ui removed - didn't use in the site so far

1. jquery-ui.css, jquery-ui.min.js files removed from _static
2. respective elements removed in layout.html
DEV: border attr from img mentioned in css
Merge pull request #1 from ksurya/cleanup

ENH: HTML Cleanup