Making elements look cleaner and more readable

Some background-transparency/text-shadow tweaks to make things look
cleaner and more readable (some text shadows were too strong, some
non-existent)
Small language tweaks

Swapped in “do what you will with it” instead of “have your way with it”
Merge pull request #2 from acusti/gh-pages

Merging in legibility updates and language tweak from gh-pages branch