Update meiview-filter.js

Allow option to remove meterSig elements, which prevent rendering.
Merge pull request #29 from mjwalter/patch-2

Update meiview-filter.js
fixed sidebar label for emendations
Merge branch 'master' of https://github.com/zolaemil/meiView
fixed unit test assertions
convert accidentals to attributes and directions
Merge pull request #34 from zolaemil/accids

Filtering accid elements
Merge branch 'master' of https://github.com/zolaemil/meiView