Github Code Folding

Code folding - the ability to selectively hide and display sections of a code - is an invaluable feature in many text editors and IDEs. Now, developers can utilize that same style code-folding while poring over source code on the web in GitHub. Works for any type of indentation, spaces or tabs.

--- CHANGELOG ---
v0.3.3
- handle multi-level nested blocks

v0.3.2
- don't expand previously collapsed inner block when expanding outer block
- styling fix that prevented copying code

v0.3.1
- remove host permission

v0.3.0
- migrate manifest to v3
- update permissions
- fix styling

v0.2.0
- fix to use CSS selectors from updated github markup
- run on bbgithub

v0.1.1
- fix missing css file

v0.1.0
- remove jQuery dependency
- use event page instead of permanent background