Another alternative SPI library for AVR? NO! It's a collection of SPI methods (and some pin low level routine) to trabsfer fast SPI data, the purpose is create a kind of 'standard' method and a serie of SPI methods libraries to use inside other libraries and in sketches.
Caution, this is an early alpha for testing only, do not use until I've checked carefully.
Currently was still untested so do not cry...