PhpBibliography 0.3

Here are the changes in this release:

* can print all the bibtexs
* help available when editing a paper
* can change the order of the authors of a paper
* can insert authors and categories on the fly
* check for empty or already existing authors and categories
during insertion/modification
* use of CSS
* generate url in bibtexs
* paper search mechanism
* show all the details of a paper in a separate page