* Large file support on win32

* Error handling

* Ship docs

* Vendor format cheatsheet document

* Lockless concurrency (long term)
  - JPEG backend now should have this (except for the cache)
  - TIFF backend will likely never be lockless as long as we use libtiff
  - Will the cache become the bottleneck?

* XTP format?

* Interscope format?

* Bacus format?
