Remove check for `values.type === 'all'` since semantics are wrong

`values` represents a snapshot of the current state of a browser, so it
could never have a `type` of `"all"`, so that check has been removed.
Rename package to css-mediaquery
Add .npmignore
Merge pull request #3 from ericf/match-impl

Changed `value.type` check and renamed package to css-mediaquery