Installation
 * Extract the content into document root or a web reachable folder.
 * Create a new folder anywhere and make sure it is writeable by the web server (data folder).
 * Edit sys/sets.php and make $nailblog_data refer to the data folder (local path).
 * If the data folder contains nailblog data, that will be used, otherwise you may login with
   username "admin" and password "admin".

Some information if you want to add your own modules to the Nailblog:
 * Every module must be in the sys directory, start with "mod_" and end with ".php".
 * To avoid variable and function conflicts always use the module name as a prefix for the
   global functions and variables inside it.
 * Global content variables (append text to these)
    * $titlecont - Window title.
    * $headcont - Header content.
    * $headdata - Page header.
    * $topdata - Top breadcrumb/menu.
    * $leftdata - Left column.
    * $rightdata - Right column.
    * $centerdata - Center column.
    * $bottomdata - Bottom breadcrumb/menu.
    * $footdata - Page footer.
 * Function call array (all module functions refered to in this array will be called)
    * $functioncalls
 * Changes to make 1.0.x modules work with 1.1.x
    * $headcalls[]="aaaaa"; -> $functioncalls[]="aaaaa";
    * $maincalls[]="aaaaa"; -> $functioncalls[]="aaaaa";
    * $actcalls[]=array("aaaaa","bbbbb"); -> if($act=="aaaaa") $functioncalls[]="bbbbb";
    * $maindata -> $centerdata
    * $headdata -> $headcont
    * $menudata -> $topdata, $bottomdata
