* weak ByteFile

* cleanup, only use in VS

* cleanup flags

* some comments

* some comments

* use Roslyn memory manager for metadata in VS

* report statistics only with --times, clarify flags2

* minor updates

* us in VS

* fix build

* fix build

* fix build

* add SFH to FileSystem

* fix build

* fix build

* fix build

* fix build

* add some comments