Typo Fixes; CSS Cleanup; Kerning Fix

Typo Fixes:
    * Fixed jQuery capitalisation [previous: JQuery]
    * Changed a full stop to a question mark
CSS Cleanup:
    * Removed empty h3{} block
Kerning Fix:
    * letter-spacing was at 0.5 which looks unnatural
Merge pull request #1 from joshhartigan/master

Typo Fixes; CSS Cleanup; Kerning Fix