[AppStream] AppStream Generator 0.4.0 released!

[Matthias Klumpp]

Hi!
A very boring release this time, mostly bugfixes and maintenance work.

Version 0.4.0
~~~~~~~~~~~~~~
Released: 2016-07-12

Features:
 * README: Add link to D tour
 * Run optipng with standard settings
 * Add command to forget extracted data for a package
 * Implement immutable suites
 * Use appender more often and apply some style fixes
 * Build with parallel by default when using Makefile
 * Drop some deprecated stuff

Bugfixes:
 * Display an error when processing a suite without section or arch
 * debian: Fix exception message if directory does not exist
 * Code improvements: More pure, more safe, more trusted
 * Drop global data validation result box
 * Don't crash if media pool directory does not exist and immutable
suites are used

Tarballs available at: https://github.com/ximion/appstream-generator/releases