Remove obsolete teensy3 binary

FC-Boot works now, no need for this.
Try increasing dfu_poll_timeout in MANIFEST state

Thought this would make the win32 dfu-util less spammy. No such luck, but it seems like a good idea anyway.
Derp, bootloader only has one interface
Minor descriptor cleanup for bootloader

Just saw Paul's note about USB DMA from Flash being sketchy. In the boot loader it doesn't matter since we exec from RAM anyway, but we might as well un-const the WCID descriptor for consistency.
Support MS descriptor requests to Device or Interface
Specify DFU device vendor ID
Accept microsoft descriptor request to interface or device
Remove obsolete comment
WCID compatibility, use ASCII-compatible vendor code

For the vendor code to make it through string conversions unharmed, we should make it part of the printable ASCII subset. Fixes compatibility with xusb when reading WCID descriptor.
Hardware serial support
More descriptor cleanup
Support for multi-interface automatic install of WinUSB