Bumps Antergos to 2016.07.19

src/antergos.ipxe

@@ -7,15 +7,16 @@ goto ${menu}
 
 :antergos
 set os Antergos
+set antergos_version 2016.07.19
 menu ${os} Installers
-item x86_64 ${space} ${os} Minimal 64bit [ISO]
-item i686 ${space} ${os} Minimal 32bit [ISO]
-choose version || goto antergos_exit
+item x86_64 ${space} ${os} ${antergos_version} Minimal 64bit [ISO]
+item i686 ${space} ${os} ${antergos_version} Minimal 32bit [ISO]
+choose antergos_arch || goto antergos_exit
 goto antergos_boot
 
 :antergos_boot
 kernel ${memdisk} iso raw
-initrd http://repo.antergos.info/iso/release/antergos-minimal-2016.05.24-${version}.iso
+initrd http://repo.antergos.info/iso/release/antergos-minimal-${antergos_version}-${antergos_arch}.iso
 boot
 goto antergos_exit