Fix for the 3rd problem in #616

The 3rd problem in #616 is that the description is never recognized.

This is because for some reason, PhpDocumentor unconditionally replaces the description with the referral. The fix here checks if the description is empty, and only if it is does it place the referral as a description.
Updated version to a11 for dev work
Merge pull request #618 from boenrobot/patch-3

Fix for the 3rd problem in #616
Merge branch 'develop' of github.com:phpDocumentor/phpDocumentor2 into develop
Merge pull request #626 from mvriel/551

Fix #551: Remove POSIX collation element start
Update contributor documentation

PHPUnit uses the CONTRIBUTING.md file to inform future contributors
what to expect and what to do.

For phpDocumentor we want to do the same as this feature also shows
in Github and thus allows more visibility.
Fix travis-ci by updating PHPUnit to 3.7.5
Merge pull request #634 from mvriel/develop

Fix travis-ci by updating PHPUnit to 3.7.5
Finish contributing guide

The contribution guide was still not completely formatted and filled.
Fix documentation errors
Refactor documentation

The documentation needs to be refactored and expanded since a lot
of information is still missing, incomplete or unclear.
Move Javascript and CSS to .static

By moving the the Javascript and CSS files into the .static folder and adapting
the template to use these we remove any dependency with the internet so that we
can write documentation and review it when no internet is available.
Make tag descriptions cmoplete

This is one of the first commits of the effort to document all tags
in this project. In this commit we have standardized all signatures
and written the descriptions for several more tags.
Improve template and write more docs

The documentation for the TODO tag could be added upon and the index should
feature a tag listing so that people can easily find the tag that they want
information on.

Also the design can be improved in some ways
Add documentation on documenting

Add a preliminary document that describes the goals for the different
manuals and how to generate the HTML and PDFs.
had to remove this include_path-based require_once in order to get vendor-installed phpunit to execute
put a docblock on the Bootstrap require element
Merge pull request #646 from ashnazg/fix-phpunit

Get vendor-phpunit to execute from composer installation
Update src/phpDocumentor/Reflection/FileReflector.php

catch parsing errors on file-level docblocks
Rewrote all SimpleXML parts to DOM;
Removed CDATA nodes in favor of plain text nodes.