add initial travis.yml

based off the template on http://www.rust-ci.org/help/
install nasm too
replace i386-elf-ld with ld
-m elf_i386
add .travis.rb test script
install qemu too
we have no kvm on travis machines, and tcg is quite a bit slower
fiddle with the timeout a bit more
upload screenshot to cubeupload
disable networking to avoid slow pxe boot
bump timeout even more
the cursor is in a different spot after disabling network
wait for os to halt
properly align the floppy size
tweak cursor position
Merge pull request #20 from charliesome/ci

Get Travis CI going