Update testrunner.htm.

Add missing `meta charset` and re-indent.
Merge pull request #478 from XhmikosR/testrunner

Update testrunner.htm.
Update JSHint rules.
Enable JSHint's `indent` rule.
Enable JSHint's `quotmark` rule.
Enable JSHint's `eqeqeq` rule and remove `eqnull`.
Move global config to jshint's configuration.
Remove unused variables.