OS front page module 

This is ready to be merged. New module files and updated os default file include:

openscholar/modules/os/modules/os_front/os_front.box.inc
openscholar/modules/os/modules/os_front/os_front.features.inc
openscholar/modules/os/modules/os_front/os_front.info
openscholar/modules/os/modules/os_front/os_front.module
openscholar/themes/os_default/css/os_default.css
Images
openscholar/themes/os_default/images/osfrontpg_columnsbg.gif
openscholar/themes/os_default/images/osfrontpg_configure.gif
openscholar/themes/os_default/images/osfrontpg_createsite.gif
openscholar/themes/os_default/images/osfrontpg_headerbg.gif
openscholar/themes/os_default/images/osfrontpg_logo.gif
openscholar/themes/os_default/images/osfrontpg_samplesite1.gif
openscholar/themes/os_default/images/osfrontpg_samplesite2.gif
openscholar/themes/os_default/images/osfrontpg_samplesite3.gif
openscholar/themes/os_default/images/osfrontpg_searchicon.gif
openscholar/themes/os_default/images/osfrontpg_support.gif