v1.0.0

Changes:
- ConfigFile must be instantiated after all Config objects
  ConfigFile.__init__ config_instances argument is an iterable of settings
  commit b2f6dfc6f0f8e223c3bde63d9d284dda1e46b324

New features:
- DictConfig sort parameter
  commit 695d0e98a295718c0d513c7d72051f325a086a04
- implemented missing methods for DictConfig: keys, values items
  commit 5ce30f6ce964ef2fd2c66c5c07de833f7500b4ad
- config_file.load() returns True if no errors have occurred
  commit ae7c771e7cbfb42fe94fd9284ac9f9a1a599e7fd

Documentation:
- examples/map_save: urwid 2.2 compatibility
  commit 3d884dc16adc8fe407a5c92ea433d51bddb99238
- fixed broken links to parameters of NotificationLevel.__new__
  commit 91f8b58a55b9d657af1891f2c8b6ff8c33b422b8

Infrastructure:
- release.sh: changed version numbering
  commit 42b8841daacc1dbea30dcdd8ddb9ce8417eb9c38
- pytest: create HTML logs
  commit c05f940bce64cd9252bce0b9124e5366d36f2cbf
- show next breaking release version in intro.html
  commit bc0ff4069665b294073f1c78daff5e271917e604
- release.sh: pull after checking out master
  commit 620b684cfaa1140d62cd9791dd6e72242a9abe95