update README
Merge branch 'master' of github.com:pazz/alot

Conflicts:
	README.md
more careful account specific prompts in compose

test if the result of `accountman.get_account_by_address(addr)`
is defined before using it
fix ui.build_statusbar if current_buffer is None

just display "[no buffers]" instead of buffer info in that case
remove call to self.exit in ui.update

in case no buffer is open
manpage generation via sphinx

this tunes the "make man" command in docs/user
to produce two manual pages, one for section 1
and one for the configuration file (section 5)
restructured user manual sources

to be more modular, which makes it easier to generate both
html docs and manpages from the same sources
autogenerate commands.rst manual section

this introduces a script and Makefile target that automatically
generates a sphinx rst section documenting all commands.
fix: misuse of 'usage' command register parameter.

this corrects an unintentionally used 'usage' parameter to the intended 'help' parameter while decorating seach modes
refine and sort commands
include autogenerated commands section in manual

to generate the commands, got to /docs/user/
and hit `make generate_commands`, which will overwrite the file
/docs/user/source/usage/commands.rst which will be included
in the next run of `make html`.
api doc love
moved api docs, updated README
fix doc urls in README
Merge branch 'testing'

Conflicts:
	README.md
do not show encrypted message parts as attachments

see also issue #243
show address in message summary if author is unset

closes #249
smarter detection of attachment subparts

We consider email parts to be attachments if they are not part of the
:rfc:`2015` syntax for encrypted/signed mails and either have
Content-Disposition `attachment` or have Content-Disposition `inline` but
specify a filename (as parameter to Content-Disposition).

issue #243
smarter recipient detection for reply

- respect reply-to header
- do not copy the content of the Bcc header
  when group-replying: it will be empty anyway!
- if value of reply-to and from differ add both
  to the recipient list
issue #246
typo
prompt for recipient if no arg to 'alot compose'

closes #274