Update Readme
Move example into directory
Lots of changes to use the Arduino Due Advance SPI
Re-indent code
new .begin to to setup SPI on demand
variables for cs and hold pin
disabled writes for over 256 for now
corrected writes less than 256 when across page boundary
Increase SPI speed to 42MHz
Fastest DUE can do is 84MHz but thats above the S25FL max speed of 65 MHz
Next speed down is 42MHz
All commands expect read have a max speed of 65MHz
Read has max speed of 44MHz
Depending on how close the DUE’s SPI Clock gets to 42MHz we shouldn’t need to implement fast_read or slow down for read
Next speed down on DUE is 28Mhz
Added fast read command anyway.
Added option #define to slow down clock during normal read
Move command defines to .cpp as not needed globally
and remove last hard code reference
Add wake and sleep commands
fix missing SPI_CONTINUE in .write
Fix read and write loop counts
Update example
Have read_info return something
Example style