Misc namespace work.
Recategorize Newspeak3CompilerAdaptor to avoid conflict between class and package name in BlackMarket.
Rename Kernel to KernelForSqueak to avoid conflict between class and package name in BlackMarket.
REQUIRES NEW BOOT IMAGE: Flatten out some namespace imports. Prep for separating the IDE's namespace from Smalltalk's.
Fix outer receiver for rename.
Manually fix incorrect category output from MemoryHole.
Ugh, make import of Color lazy because it is not available during bootstrap. Colorization should be factored out of the compiler adaptor.