Merge pull request #1 from impresspages/master

update fork
make ImpressPages compatible with PHP 5.5
(by dropping E_DEPRECATED message caused by using mysql_ functions)
add a function to get asset from theme
Merge branch 'php_55_compat' of https://github.com/greybyte/ImpressPages-CMS into 3.9
Merge branch 'get_theme_asset' of https://github.com/greybyte/ImpressPages-CMS into 3.9