Merge branch 'pulls/783/remove-new-issue-link-if-unauthorized' of https://github.com/finnlabs/chiliproject into unstable

It turns out in this case or core patches, unloadable actually breaks in
development mode. Did I already mention that I hate the Rails reloader?

Gravatars now generally have a border and are displayed equally.
The Issue history formatting is cleaned up with much of the positioning
magic removed in favor or a simple float.

This brings us a reliable filter override until
https://github.com/Shopify/liquid/pull/87 is accepted and
released upstream.

This commit moves the markup caching into Liquid rendering. As
Liquid allows to return different results depending on the environment
(variables, logged user, ...) we only cache the page if it contains
no active content.

Unfortunetely, active content currently also includes the TOC
in wiki pages.

Settings extension to handle cache behaviour by Gregor Schmidt.

Patch provided by Jérôme BATAILLE.
Test from Jean-Philippe Lang.

Conflicts:
	config/locales/bg.yml
	config/locales/bs.yml
	config/locales/ca.yml
	config/locales/cs.yml
	config/locales/da.yml
	config/locales/de.yml
	config/locales/el.yml
	config/locales/en-GB.yml
	config/locales/es.yml
	config/locales/eu.yml
	config/locales/fa.yml
	config/locales/fi.yml
	config/locales/fr.yml
	config/locales/gl.yml
	config/locales/he.yml
	config/locales/hr.yml
	config/locales/hu.yml
	config/locales/id.yml
	config/locales/it.yml
	config/locales/ja.yml
	config/locales/ko.yml
	config/locales/lt.yml
	config/locales/lv.yml
	config/locales/mk.yml
	config/locales/mn.yml
	config/locales/nl.yml
	config/locales/no.yml
	config/locales/pl.yml
	config/locales/pt-BR.yml
	config/locales/pt.yml
	config/locales/ro.yml
	config/locales/ru.yml
	config/locales/sk.yml
	config/locales/sl.yml
	config/locales/sr-YU.yml
	config/locales/sr.yml
	config/locales/sv.yml
	config/locales/th.yml
	config/locales/tr.yml
	config/locales/uk.yml
	config/locales/vi.yml
	config/locales/zh-TW.yml
	config/locales/zh.yml
	db/migrate/20100217010520_add_custom_filter_to_auth_sources.rb
	lib/chili_project/version.rb

We programmers have a nice new years tradition: We revisit all of our
projects and add 1 to a small number near a "(c)".

-- Volker Dusch
https://twitter.com/__edorian/status/153801913442373633

This is necessary because in Ruby 1.9.3, the behavior of an internal dup of
the array (rb_ary_dup) was changed to always return an array instance, not
an instance of the actual class which it was working on.

Why can't people just stick to what works but instead try to have special
snowflakes everywhere? </rant>