Oops… use proper quotation mark in intro copy contraction.
Make the testing for a translation case insensitive while keeping case sensitivity if no test is found.
Add support for "any" along with `a |an |a single |one |1 `.
Fix visited colour for contribute banner
Tweak whitespace translations

Differentiate between "whitespace" and "any whitespace" and allow
hyphenation or space between "white" and "space". Added this because
"any whitespace" is used in the tutorial example and would have
translated incorrectly.
Re-factor the intro copy a bit to try make it clearer how this all works.
Minor intro copy tweak.
Merge branch 'dev' into gh-pages
Latest css after merge.