Refactoring of genelist.php

Fixed potential SQL injection leak in genelist.php.

Refactored genelist.php to provide an interface with region-based
search. Original gene-based search is split into querygenelist.php.
genelist.php will respond to regions now (although with no results).

Changed index.php so that if region is entered, no hint of gene names
will be given.

Minor change of styles.