misc cmall changes to organ
misc tweaks.  not even sure all of them are a good idea
adding in spiEEPROM demo, just before memory read/write
deleting apparently empty rot13.  where did the real one go?
eeprom writing and reading example
bulletproofed eeprom demo, added a few more flags, some text
Big change: USART library
 changed "transmitString" to "printString"
 added a bunch of other "print" commands
 woot.
starting up i2c demo
added in spi/i2c pin defines, and modified eeprom demo accordingly
streamlining and regularizing i2c api.
should consider breaking it out into a library
split off i2c stuff into own library
still depends on some of the pin defines -- need to factor that out eventually
librarified the EEPROM flash 25LC256 library stuff
added in byte, word read/write functions into the library.
straight to working logging thermo demo, complete with tons of libraries
changes to spi demo -- cleaned up functions, added a couple more
added 16-bit number printing as default to usart library
more tweaks to ignore file