Bitcoin: Added more trigger words.
Bitcoin: Add border-radius.
BrainyQuote: Check if the result is a category or not.

Queries such as "quote mining", "financial quotations", or "lame quotes" should not show up.
BrainyQuote: Add spaces between acronyms.

We're going to convert queries such as J.R.R. Tolkien to J. R. R. Tolkien because that's what BrainyQuote accepts.
Merge branch 'jag/release/bitcoin' into jag/release/brainy
BrainyQuote: Error checking into one if statement.
Merge pull request #406 from duckduckgo/jag/release/brainy

BrainyQuotes
Change checkmark symbol to X
Update spice_pr_template.md
.travis.yml: remove stale perls.
README: add travis status image.