Fix another case of double slurpy

There shouldn't be any more in the core now.
Give a better error for 'my int $a is default(*)'
Eradicate Seq with fire

Oddly enough, src/core/Seq.pm was not included in an backend setting.
item() returns Parcel, like .item already did

This part of the Seq cleanup
Add Range coercers for int1 and uint1
Merge pull request #312 from b2gills/nom

Add Range coercers for int1 and uint1
Eh, and what about (u)int2 and (u)int4 ?
Auto-sense 32/64 bitness
Simplify CompUnit construction
Simplify CompUnitRepo::Locally construction
Minor streamline of prompt()
bump nqp rev for parrot bigint fix, skids++
Merge branch 'nom' of github.com:rakudo/rakudo into optimatch