Bumblebee-status

This is a rather large release - a big **THANK YOU** to the many contributors!

New Modules and Features
- Collapse and expand modules using the middle mouse - 7152bb1
- Use SIGUSR1 to force update (thanks to WORD559) - 705c18d
- Module `indicator`: Indicators for CAPS, Num, Scrl (thanks to freed00m) - e079328
- Module `deadbeef`: For the DeaDBeeF audio player (thanks to WORD559) - 5239e3e
- Module `notmuch_count`: Show results of notmuch queries (thanks to abdoulayeYATERA) - 797230d
- Module `progress`: Show progress of file operation (thanks to remi-dupre) - 4ed1e8b
- Module `arch-update`: Show pending Arch Linux updates (thanks to lucassouto) - 440b537
- Module `xkcd`: Show random XKCD comic (thanks to whzup) - 3532028
- More tests! (thanks to 4shadoww and Frank Scherrer)

New Themes
- gruvbox-light (thanks to freed00m) - ce60b10
- iceberg-powerline (thanks to whzup) - a8580bb
- iceberg (thanks to whzup) - 58b4868

Improvements and Bugfixes
- nic: Add option to show SSID (thanks to kunalshetye) - fb6a9b1
- publicip: Performance improvements for U.S. East (thanks to avindra) - 56088be
- mpd: Add option to hide widget if not playing (thanks to kunalshetye) - 9514f1f
- pulseaudio: More robust device detection (thanks to WORD559) - 841b5e0
- pulseaudio: Make autostart work (thanks to mijoharas) - 37929d4
- amixer: Add mute check (thanks to susmus) - e8970f1
- todo: Fix path expansion (thanks to abdoulayeYATERA) - f4b7f90
- sensor: Use sensor command, if available (thanks to eknoes) - 9ef3da8
- spotify: Add playback indicator (thanks to WORD559) - 59bca44
- Linting and better code style: Thanks to fredj

New features
- Show SSID for Wifi interfaces
Bugfixes
- 275 sensor fixes
- pulseaudio fixes (autostart, device selection)
- memory: better calculation of free memory
- more graceful handling of wireless devices

Improvements
- traffic: Hide down interfaces (thanks to TheEdgeOfRage)
- nic: Add output format parameter (thanks to kunalshetye)
- new theme "greyish-powerline" (thanks to F00dwarrior)
- new module "taskwarrior" (thanks to chdorb)

Bugfixes
- brightness: Return format fix (thanks to caianrais)
- theme engine: Remove unneeded YAML dependency (thanks to fredj)
- general: Removed typos (thanks to torvitas)
- battery: Better error handling
- getcrypto: Handle downtime of crypto service
- datetime: Fallback to en_US formatting
- memory: Fixes to percentage calculation

Improvements
- Module `redshift` now updates in the background and does not block the bar anymore
- Awesome fonts in the theme can now be referenced by name (using ${<name or id>})
- Add generic mechanism for slow updates and use it for various modules (hopefully, this part didn't break anything)
Bugfixes
- Update stock widget only every hour

Small hotfix release (Do not fill the disk)

fixes 213: `bumblebee-status` always logged messages to stderr (even when `-d` was not specified), which end up in `~/.xsession-errors` and consume a lot of diskspace very quickly.

This release completely disables logging, as long as `-d` is not specified.

Also, introduces two "special" log file names, `stdout` and `stderr` to log to stdout and stderr, respectively.

Theme support extension release
- Add support for [pywal](https://github.com/dylanaraps/pywal) in themes: Add a "colors" instruction and then simply use names for your pywal colors (see the `wal-powerline.json` themes for examples)
- Themes can now be stored outside the repository structure (i.e. in `~/.config/bumblebee-status/themes/`). Themes will be merged, so it is also possible to partially overwrite theme instructions by placing partial JSON files in this directory, with the same name as the main theme (for example, anything you write into `~/.config/bumblebee-status/themes/powerline.json` will overwrite the default `powerline` theme settings).

New modules
- `rotation` by [cacyss0807](https://github.com/cacyss0807): Cycle through display orientations
- `hipchat` by [fredj](https://github.com/fredj): Show number of unread hipchat messages
- `uptime` by [fredj](https://github.com/fredj): Show current uptime
- `zpool` by [adam-dej](https://github.com/adam-dej): Show zpool (ZFS) information

New theme
- `sac_red` by [batman-nair](https://github.com/batman-nair)