- Wrote more unit tests to make sure filestore behaves as expected
- Renamed NewFileDataStore to DefaultFileDataStore, implemented a new
NewFileDataStore for unit tests.
- filestore now removes entire mailbox dir when last message is deleted
- Removed extra message object from ReadBody() return type
- We now use enmime's GetHeader() when building the GOB, this will get
us alternate character set decoding for the From and Subject headers.
- Added a swaks test with a utf-8 subject line