add template to be used by syslinux vesa menu support

A new template has been included to enable live-helper to support
syslinux vesa menu. This includes a font, splash image and a new
configuration file.

templates/syslinux-menu/isolinux.cfg

@@ -0,0 +1,23 @@
+FONT               data/lat1-16.psf
+DEFAULT            data/vesamenu.c32
+
+TIMEOUT            1000
+PROMPT             0
+
+MENU BACKGROUND    data/splash.png
+MENU COLOR TITLE   * #FFFFFFFF *
+MENU COLOR BORDER  * #00000000 #00000000 none
+MENU COLOR SEL     * #ffffffff #76a1d0ff *
+MENU COLOR HOTSEL  1;7;37;40 #ffffffff #76a1d0ff *
+MENU COLOR HOTKEY  1;37;40;44 #90ffffff #00000000 std
+MENU VSHIFT        7
+MENU HSHIFT        6
+MENU WIDTH         67
+MENU TABMSG        Press [tab] to edit the menu entry
+MENU TIMEOUTROW    16
+
+LINUX_LIVE
+
+LINUX_INSTALL
+
+MEMTEST