Greaseweazle Tools v0.34

Release Notes:

• Firmware is now released separately from the host tools
• gw update: Automatically download the latest firmware from GitHub
• Fix read/write raw files (HFE, SCP, etc) when --format is specified
• Allow Acorn ADF images to be read and written using --format specifier
• Support SCP images containing Supercard Pro C64 dumps including halftracks