draft is now a regular type like translation or pages.
allow multiple views per rule
fix bold and underlined ANSI escape codes
test version upgrade compatibility

- print changes between current and newest version
- when something might break current settings, exit prematurely
  so the user has time to fix his settings.
add CHANGES.md to MANIFEST
logic failure
Merge branch 'master' into develop
autocompilation no longer forces generation when conf.py changes
replace md5 with custom hash function
cache slug property
don't filter for drafts in feed.py
use md5 for cache path, not sure how solid python's hash function is
shorter way to create a version object
don't pop views from conf variable, breaks auto-compilation
use Attest-latest instead of master from git repo
move cache.clear to the very beginning
add relative and absolute url filter

- relative applied to index and tag view per default
- absolute applied to feeds (not required, but recommended)
populate_tags is now an official API call
apply relative/absolute filters also to images and rss feed
include version and priority into hash

- also replace version variable with simple integers