Syntax: use the more explicit @crossStage instead of @persist

Fix tests on Windows and remove warning

Set up CI

Minor improvement to handling of open code with nominal free variables

Bump Scala 2.12 version

Add a slightly simpler version of the binding reversal test

Fix lifting of var types

Fix doc and add non-serializability test

Fix class lifting: correct filtering of top-level package definitions

Fix class lifting: had wrong expected type for method bodies

Simplify .gitignore

Implement class lifting as a cleaner alternative to the old @embed macro

Bump Squid SNAPSHOT version

Add missing compileTime doc

Support unapplySeq in rewrite patterns