one more fix to type parameters
applies some tuning to the ApplicationWithInsertedApply heuristics
applies some tuning to the DesugaredUpdate heuristics
support for fast track macros: very exotic!
more tuning for heuristics

I wish I had time to implement those robustly using attachments
fixes treatment of lazy vals declared in traits
ensugars unit insertion for blocks that end in a member def
a todo about another unit insertion instance
some support for classfile annotations
better logging for ensugarings
fixes a stack overflow in eta desugaring
refactors handling of accessors
fixes an exponential conversion time bug for ApplyInfix and Interpolate
better require for Helpers
fixes wildcard patterns in for generators
finally fixes require for Helpers
fixes an overeager assertion in DesugaredSetter

Getter and setter might actually come from different levels of the
inheritance hierarchy, so we can't assume that they have the same owner.
fixes handling of annottee types in Annotated ensugaring
initial support for early defs
fixes a bug introduced when refactoring accessor handling