Remove useless columns from search results and fix/refactor templates

This pull request will solve two issues:
- "Remove useless columns from search results" https://github.com/sasanrose/phpredmin/issues/49
- "Forgotten "php" after <? tag" https://github.com/sasanrose/phpredmin/pull/48

Also all templates were refactored to use long notation (i.e. endif, enforeach)

> this alternative syntax is excellent for improving legibility (for both PHP and HTML!) in situations where you have a mix of them.