Relax "mimetype" requirements in OCF?

[GoogleCodeExporter]

This is a very quick attempt to summarize a long on-list discussion ("Re: 
Authoring pain & requirements").  While providing a good signature that can be 
verified without understanding Zip or XML (container.xml), the "must be first, 
must be unadorned, must be uncompressed" restrictions make EPUB harder to 
create that may be needed.  Suggestion (some mutually exclusive):

-- Make "mimetype" optional
-- Allow trailing whitespace (e.g. "\r", "\n") on "application/epub+zip" in 
mimetype file content.
-- Allow "mimetype" to be anywhere and adorned and compressed

I (Garth) can't say I love this relaxation... but, the issue is logged for 
future discussion/decision.

Original issue reported on code.google.com by [email protected] on 19 Aug 2010 at 12:53