This PR does a few things:
- supports async mode for sending mails
- registers imagemagick as handler for images if it exists
- sets default downloads directory if it exists
- sets a few (more) sane defaults
- supports format=flowed in messages
This commit adds a custom layout for mu4e related buffers. Four different major
modes are used in mu4e buffers based on their purpose, so a function is used to
add buffers in these modes to the new layout. This setup is largely based on
that of the ERC layers custom layout.
- Clarify installation instructions
- Bring README in line with conventions
- Create layer variable for installation path
- Move mu4e-account-alist to config.el
- Move extensions.el to packages.el
- Define mu4e as built-in and not local
- Add commands to ensure mu4e is deferred