Remove global directive from tests; it's set in .jshintrc.
Fix typo.
testrunner.htm: fix undefined variables.
Merge pull request #485 from XhmikosR/globals

Move global config to JSHint's configuration.
Remove unused variables.
Merge pull request #487 from XhmikosR/unused

Remove unused variables.
Merge pull request #486 from XhmikosR/testrunner-undef

Fix undefined variables and typo
Specify html lang.
Move demo JS to demo.js.
Tweak CSSLintDemo.