Final DB modifications

[jamoore]

If we have time to perform further DB changes, the following would simplify much of the OriginalFile? and binary logic put in place for FS:

Mimetype

• register() should check for mimetypes
• originalfile super class so there's no mimetype??
• OriginalFile? extends BaseFile? to remove sha1, mimetype, etc.: Dropping several of the OriginalFile? fields would significantly simplify synchronization between the FS and the DB.
• Move DIRECTORY_MIMETYPE to constants.
• Mimetypes (including "Directory") should be compared to standards: There are various mimetypes relating to directories. Perhaps we could either use of those, or use an "application/vnn.openmicroscopy.dir" style

filesets

• add javaVersion to FilesetVersionInfo?. (And Python?)
• Review all the version info set by python/Java/C++
• where to put tags during upload
• check for other definitions of "Reader" (with formatString.replaceAll)

Misc

• PixelsType?.MIN|MAX in database

[mtbcarroll]

Things like repositories and directories and whatnot should perhaps each have separate classes in the hierarchy.