Load org support by default, unless mu4e-org-support is set to nil.
Turn off speedbar support by default (set mu4e-speedbar-support to t to
re-enable it).
Move the non-obsolete org stuff to mu4e-org. Rename some things from
org-mu4e to mu4e-org.
Remove org-old-mu4e.el
Autoload functions `mu4e' and `mu4e~compose-mail' and the definition of
the mail-user-agent `mu4e-user-agent'. The last to are required so
that `compose-mail' can be used without explicitly loading mu4e.
Also require `mu4e' in mu4e-compose.el (after providing mu4e-compose
to avoid a circular dependencies). This is required because the
autoload definitions only cause mu4e-compose but not mu4e to be loaded
when using `compose-mail', but if mu4e isn't loaded various handlers
are not loaded (and possibly there are other problems if mu4e is not
fully loaded).
The first sentence should summarize the variable's or function's
purpose and it should fit on the first line. Change existing
doc-string by:
* Move first sentence onto first line even if that makes it _a bit_
long.
* Move additional notes out of first sentence and add them later,
possibly as complete sentences.
* If I am uncertain whether doing the above would alter the meaning,
_don't_ do it.
* If fitting the initial sentence on the first line would require a
complete rewrite of the doc-string _don't_ do so unless it is very
easy to do.
* Remove indentation from second and later lines if it is there to
align them with the first in the source code, instead of in
`describe-*' output.
* Make "pullet point" lists a bit more consistent.
Obviously this does not fix all problems but it's a start.