Fix bin/test script

It should return != 0 on errors, and does absolutely not need to depend on bash.
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Minify instance stylesheets

This makes sure that also instance specific stylesheets are minified.
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Fix adhocracy.behind_proxy evaluation in requestlogger

Previously, adhocracy.behind_proxy was always the default since pylons.config is not initialized at the point of evaluation.
Add watch button to instance overview (fixes #655)

Note that watching an instance results in quite a few notifications
being generated.
Add permission watch.instance

As watching instances can lead to many notifications, this can be
disallowed by permission settings.
Disallow milestones without date (fixes #656)

* Add validator assuring milestones have an assigned date
* Disallow NULL in milestone database model
* Add migration enforcing NOT NULL by deleting milestones without date
Fix broken bin/test script

Fixup a2294460447559c9a67c2eeb0860bf3a67463bea
Remove subpages css

This is needed in some themes but not part of core adhocracy.
This old version is currently broken with those themes.
It should be fixed there.

Please note that all themes need to update their adhocracy.scss
Merge pull request #659 from xi/feature-rm-subpages-css

Remove subpages css
make lib.logo generic
abstract xy validation
create avatar route
profile sidebar
add border to button_round

only a slight difference but differentiates button
from background
fix follow button spacing