* Bump version to 2.0.0; bump dependencies versions
* Make v2 docs the primary docs; jettison the v1 docs’ source: whenever the v1 docs need to be rebuild in the future, that can be done on the `1` branch and copied over; simplify folder tree
* Updated v1 docs that reflect that v2 is out and have updated paths to reflect that the v2 docs are now the primary docs, and the v1 docs only live under /v1/
* Add Google Analytics; track navigation, editing code and running code
* 2.0.0 changelog
* Fix link to root docs
* No more @next; installing local copy should be --save-dev
* Analytics on the browser-based tests page should prove fascinating . . .
* Update annotated source
* Add note to changelog clarifying scope
* Docs: named functions and function declarations
* No more prototypal `extends`; update docs and example
* More comprehensive documentation of the existential operator; closes#1631
* Better document operators, including `from`
* No fat arrow class methods anymore
* Destructuring shouldn’t say that default values are applied in case of undefined or null
* Spinoff generator and async functions into their own sections; reorder things so that the sections on functions come just before classes, and destructuring goes next to the operators (which discuss assignment)
* Rewrite “CoffeeScript 2” section, making it less practical and more explanatory; move practical info into “Usage”
* Update “Variable Scoping and Lexical Safety” section to remove incorrect reference to Ruby (fixes#2360), add missing details about the safety wrapper, add note about `let`/`const`.
* Updated browser compiler
* Updated docs
* Rewrite Literate CoffeeScript breaking changes
* Split apart the “Breaking Changes” and “Unsupported Features” sections into separate sidebar items and files
* Add example of `not in`, closes#3281
* Fix words in bold that should be in backticks
* Consolidate some breaking changes sections
* Add Node API documentation; closes#3551
* Move the chaining documentation out of the changelog into its own section
