Display annotations in side-bar
Scroll to top on new PDF
Fix merge with stash
Minor fixes
Update Protobuf schema

- Add required fingerprint 
- Rename uri to uuid and make required
Add fingerprint to Document in parser
Add uuid to annotations
Make FileLoader slightly more generic
Embed annotation UUID in viewer 

- Use Backbone for annotations 
- Tweaks
[WIP] Delete & Highlight of annotations

- Some design considerations still needed 
- URL routing is only client side now
- Still not happy about the setActiveAnnotations() :(
[WIP] Scroll to and delete of annotations
Update pdf.js
Clean-up TODO
Tweaks
Tweaks 

- No WebGL 
- Less strict whitespace check 
- Slightly less long annotation excerpts 
- Do not embed UUID for minimap
Re-add WebGL option to pdf.js
Add “annotations” to divider in blocks
Optimise re-rendering of minimap segments
Minor fixes
Highlight annotation on hover in sidebar