rails update to 3.2.19
care less about all the html generated by the version controller, just look for the important stuff
check for the absence of a successful XSS-attack rather than the means to avoid it
bump version to next stable release version
copy svn support scripts as-is from our chef deployment scripts
replace occurences of 'redmine' with 'openproject'
add back --redmine-host option for compatibility

because we don't want to break old OpenProject installations.
However, this options is deprecated.
We need libapache2-svn for a working svn setup
re-integrate repository_authentication plugin
fix failing specs
Merge pull request #1623 from opf/backport/1615

Backport/1615
Merge pull request #1577 from opf/feature/rails_3219_update

rails update to 3.2.19
Merge branch 'release/3.0' into dev

Conflicts:
	Gemfile.lock
	extra/svn/OpenProjectAuthentication.pm
	lib/open_project/version.rb
	spec/controllers/sys_controller_spec.rb
	spec/controllers/versions_controller_spec.rb
remove dev-angular branch from .travis.yml

Git-flow recommends to use "--no-ff".
http://nvie.com/posts/a-successful-git-branching-model/

But dev-angular reffers to same revision with dev.

<pre>
$ git branch -v -r --abbrev=9 | grep gh-finn/dev
  gh-finn/dev           cc5bedac9 Merge pull request #1386 from opf/bugfix/icon-font-toggler
  gh-finn/dev-angular   cc5bedac9 Merge pull request #1386 from opf/bugfix/icon-font-toggler
</pre>