Interim release 0.2.1

This release fixes one major bug in 0.2:

• twi_read() would not correctly issue STOP when told to do so, leaving bus in bad state

Interim release 0.2

Another interim release. Highlights:

• Rewrite of TWI drivers, allowing multi-part read/write and corrects several major protocol errors
• Ring-based task scheduler: Co-operative multitasking, low memory overhead with two priority levels
• Debug output available from library
• Listening sockets in W5500 driver
• Use void* buffers in several drivers, to avoid need to do additional casting

Interim release 0.1

This is an interim release on the road to completing all drivers and shield support.