Alot

* avoid traceback infos from getting written on top of the ui
* new "--help" output, autogenerated manpage
* version string extracted from git for cli option "--version"
* command line subcommands: compose and search
* properly display multiple headers with the same key
* envelope.set option "--append"
* more detailed CUSTOMIZE docs
* multiple fixes for the envelope buffer
* exit on closing of last buffer is now optional
* die gracefully when config parsing fails
* random bugfixes in the ui
* determine attachments via the "Content-Disposition" header
* nicer alignment for messages in thread buffers
* deal with external commands as lists of strings instead of strings
* better filetype detection in attachments via magic numbers
* errbacks and correct calling of post-hooks for deferred commands
* add packaging info for debian
* envelope.headers stores lists of values for each key now
* default binding: 's' to 'toggletag unread' in search buffers

* extensive API docs
* fancy shortening for authors list
* moved default location for config to ~/.config/alot/config
* message templates
* hooks for pre/post editing and RE/FWD quotestrings
* recipient completion gives priority to abook of sender account
* smarter in-string-tab completion
* added ability to pipe messages/treads to custom shell commands
* initial command configurable in config file
* non-blocking prompt/choice (new syntax for prompts!)
* usage help for every command
* bindings help
* tons of fixes

This minor release is mostly bug fixes and some small features.
I wanted to release a more stable and usable version before I start
hacking on a thread view rewrite.

* renamed config section [tag translate] to [tag-translate]
* docs: more elaborate API docs, INSTALL and USAGE as markdown in github wiki
* more compact header displays in thread view
* command-line history (for one session)
* editor file encoding is now user configurable
* signatures for outgoing mails per account
* optional display of message content in search results
* config option for strftime formating of timestamps
* printing

* fix parse multiline headers from edited tempfile
* fix reply to unusually formated mails (e.g. no recipient)
* fix lots of encoding issues
* handle extra wide characters in tag widgets
* fixes in ui.prompt
* fix storing outgoing mails to sent_box
* more liberal header encoding for outgoing mails
* use mimetype lib to guess right content-type of attachments

* info: missing html mailcap entry now reported as mail body text
* feature: Allow regex special characters in tagstrings
* feature: configurable thread mode message indentation
* new thread buffer command "indent" (bound to '[' and ']')
* config: new option thread_indent_replies
* config: new option exclude_tags
* config: new option encrypt_to_self
* config: update behaviour of encrypt_by_default

* feature: Add command to reload configuration files in running session
* feature: new command "tag" (and friends) in EnvelopeBuffer to add additional tags after sending
* feature: Themes can now be loaded from system locations
* bug fix: GPG signatures are acutally verified
* feature: option to use linewise focussing in thread mode
* feature: add support to move to next or previous message matching a notmuch query in a thread buffer
* feature: Convert from deprecated pygppme module to upstream gpg wrappers
* feature: Verify signatures/decrypt messages in multipart/mixed payloads

* save command prompt, recipient and sender history across program restarts
* new config option: "handle_mouse" to enable interpretation of mouse events
* prompt for unsent messages before closing
* enable variable interpolation in config file
* Add encryption to CC addresses
* Add bufferlist, tablist and pyshell subcommands to the command line interface
* new hook: "loop_hook", that runs periodically
* new config option: "periodic_hook_frequency" to adjust how often to fire "loop_hook"