Make sure grep() and first() use the same check
Add (Typed)Hash method "keyof"

Not sure where to spec this, and whether the name is ok
Fix postcircumfix:<( )> / mixin semantics.
Hopefully fix Rakudo Parrot build.

colomon++ for reporting.
Fix statement mod given/for rw-ness.
Fix long standing copy-pasto.

Exposed by what should have been a benign fix to for/given statement
modifiers.
Eliminate call_sig lexical.

Wasteful to do this for every block, and would be doubly wasteful on
JVM to do it right.
Fast-path for common case in MapIter on JVM.
A couple more MapIter optimizations.
A couple more buffer pre-size optimizations.
Add reference to BOOTSTRAP
Removed now superfluous class Nil {} definition (now done in BOOTSTRAP)
Get nextsame, callsame etc. tests passing.
shell -> nqp::shell
Chase latest NQP change.
Remove superfluous call to STORE, "new" handles this also
Changes suggested by jnthn to make sure empty {} doesn't generate Nils
Slight cleanup for circumfix {}
Remove useless fail in unshift
Fix // compilation, thus fixing version.t.