Update echo of new-line on message from fatal.
Allowing larger IOBuffers; uint8_t SIZE is now uin16_t SIZE which gives max 32KB.
Add new SPI transfer member function; transfer_next()
Fixed IOStream precision and width initialization.
Adding a new abstract interface for Flash::Device.
Updating S25FL127S Flash memory device driver.

1. Refactoring to Flash::Device interface.
2. Removing page alignment requirement for write().
3. Adding write_P() for data in program memory.
4. Adding example sketch with performance measurements; write 200Kbyte/s, read 600 Kbyte/s.