pushInsteadOf to force ssh instead of HTTPS.
Never save magit buffers.
Hook up mail in emacs

This configuration uses mu4e, offlineimap, and (async, doesn't actually
work) smtpmail.

offlineimap:

```
git clone gh:OfflineIMAP/offlineimap ~/offlineimap
cd ~/offlineimap
virtualenv venv
./venv/bin/python setup.py install
ln -s ~/offlineimap/venv/bin/offlineimap ~/bin/offlineimap
```

I had to goof around bit with `brew` to get GNU `m4` all sorted, but:

```
brew install mu
mu index --rebuild
```
Unbind C-x C-b, I always mis-strike it.
On second though, bind C-x C-b to switch-to-buffer.

This is almost always what I want.
Bail on aysnc smtpmail for now.

I get process sentinel errors in mu4e compose.
Drop mu4e signature.
Make sure we clobber account alist.

Avoids confusion on update.
Kill smtp-auth-credentials; unused.
Split out account credentials.
Set up macGPG2.

https://gpgtools.org/
http://www.dancingfrog.co.uk/posts/2013-09-11-gpg-agent-osx-and-emacs

Needed for useful agent integration.
Speed up offlineimpa.
More offlineimap perf.
Skip dupes, periodically update mail.
mu4e fancy chars, default MUA.
Hide mu4e index spam.
Include related messages in mu4e.
Sign messages by default.
Add build.
Skip nagios, root mail.