Updated to build 139. Import of pcengines.apu_139_osp.tar.gz
Minor buildscript fixes
Added support for creating bios update images
(based on the work of pcengines: http://www.pcengines.ch/tinycore.htm)
Added README file
Updated README, added flashing section
Updated update image
Updated documentation, added general and flash recovery info
Updated documentation,  added info about building on Ubuntu.
Fixed e-mail address
Updated author
Updated buildscript