Added test cases and tweaks to HTML stripping to be a little more careful, no longer assumes every `<` is an openning tag.
Fix to prevent documents being index multiple time per-term. This would occur if the same token existed in multiple fields.

Also added a change where index all stop words. Standard query still ignores them, partial match query includes them.
Merge branch 'master' of https://github.com/tyleregeto/memsearch