Merge pull request #892 from mvriel/889

[#889]: Fixed display of packages on the frontpage
Merge pull request #877 from mvriel/862

WIP: [#862]: Replace slashes for path with DIRECTORY_SEPARATOR
Merge branch 'develop' of github.com:phpDocumentor/phpDocumentor2 into develop
* Some fixes for the for-users/introduction/definitions documention
 - Corrected the for-users/type link
 - Double backslashed the namespaced FQSEN example
Merge pull request #903 from kublermdk/develop

Some fixes for the for-users/introduction/definitions documention
issue-904 add support for ignore tag
Merge pull request #907 from xoyk/issue-904

issue-904 add support for ignore tag
Merge branch 'develop' of github.com:phpDocumentor/phpDocumentor2 into release-2.0
Updated changelog
Ease symfony/validator version constraint slightly

Also fix a test
Merge pull request #912 from tommygnr/patch-1

Ease symfony/validator version constraint slightly
Add first setup for a reference implementation
Merge branch 'develop' of github.com:phpDocumentor/phpDocumentor2 into release-2.0
Update Vagrant and Puppet to work out of the box
Merge branch 'develop' of github.com:phpDocumentor/phpDocumentor2 into release-2.0