Add test for Link with title: [[z:/foo|bar]]
Fix handler signature to dokuwiki standard
Fix renderer signature to dokuwiki standard
Handle dokuwiki title syntax
Use dokuwiki windowssharelink to render title

Let the original windowssharelink function from inc/renderer/xhtml.php
handle link and add the title. This also fixes the code duplication.
The functionality of detecting if the file actually exists is retained
in the renderer, so that changes on the fileserver are visible
immediately.
Remove now unsed local copy of windowssharelink
Test the correct use of the dokuwiki title syntax
Add feature: fileserver 3rd column in mapping.php

Add feature to read the fileserver per drive-letter from mapping.php. If
there is no third column  (i.e. fileserver) given for a drive-letter in
mapping.php, then the conf['fileserver'] value is used, if it is set.
This also ensures backward compatibility.

However. Since we can no longer be sure that there are only two values on
each valid line of mapping.php, we can no longer simply use confToHash,
but now have to manually reassemble two sets of lines: lines_fs and
lines_pathes.
Ensure mapping.php is empty for parser tests
Do not declare unused global $conf
Test the link class for files on the fileserver
Extend the example mapping.php

The example mapping.php should now also show the possibility to add an
fileserver to the end of the config line.
Update the plugin.info.txt to the current date.
Add .travis.yml for integration testing
Performance improvement
Merge pull request #6 from micgro42/addTitle

Add functionality to support dokuwiki title [[y:/path/fo/file|Title]] and fileservers in the mapping.php file