* Add main contract, contract interface, and guards to the docs syntax
* Use Sep1 instead of Sep for the GuardedDef
* Add guarded case for switches
* Change '=' to '::=' in GuardedDef
* Add Using
* Add '|>' binary operator to aeso_syntax
* Add assign patter
* Fix typos
* Add polymorphism implmented interface syntax
* Add operator lambdas
* Do not register anonymous functions as called functions
* Add tests
* Update CHANGELOG
* Update the docs
* Do not allow (..) to be used as a lambda
* Rename the function sum to any
* docs: restructuring & introduction of mkdocs with versioning provided by mike
* docs: ad repositories section to sophia examples
* docs: refactoring and consistent naming of æternity
* docs: hint for new file destination
* docs: revert capital letter
* docs: accept proposed changes
* docs: fix anchors in stdlib
