v0.9.6
[i2c] Generalise i2c bit-bashing support to addressless devices
[blockdev] Move block device operations to structure block_device_operations
[virtio] Split virtio-net.c into several files.
[x86_64] Fix assorted 64-bit compilation errors and warnings
[b44] Add driver for Broadcom bcm44xx cards
Modify gPXE core and drivers to work with the new timer subsystem