added wp_footer hook
support for submenus in navbar

for the sake of simplicity there is only one level of submenus ie. no
submenus of submenus. since arrays are immutable in php, I had to use
Linked Lists to append submenus to parents.
read contact email and blog name from options in footer
minor updates and fixes

language support for search placeholder
removed hardcoded src for navbrand image.
added language switch button on navbar
added language switch configuration to theme options
language support for Search button title attribute
change version to 0.6