Ensure same type also.

eql(6) would match 6 or '6' (==)
be(6) only matches 6        (===)
Add charset meta tag to spec runner.

I'm trying to fix the encoding of the symbols, but still no luck :-(
Use context where appropriate.
Add specs for #canSpell.
Add spec for letters after word on board.
Refactor specs for #canSpell.

I like this style better, as it describes the purpose of the test rather
than the specifics. Besides, you can easily see the specifics in the
code for the test.
Fix test passing for wrong reason.

Forgot the 'R', so the word didn't match, regardless of the trailing
letter on the board.
Merge pull request #3 from seven1m/feature/specs

Spec for #canSpell