Add BrewPiStrings h/cpp to project
Restored old way of printing spaces to the LCD. Only 20 bytes bigger, but easier to understand and safer.
Re-use string with 6 spaces to blink temperature.
Changed string to blink mode setting from 12 to 13, was 1 too short.
Big project cleanup.
1. Renamed debug functions/files to logger functions
2. Placed config defines where they belong
3. Added missing copyright messages
4. Removed WString.cpp
5. Removed ArduinoUnit utility directory
Added copyright to files where I have authored or contributed significantly. Updated Elco's copyright for original code to 2012-2013.
Added the diy-shield OLEDFourBit code. Added new methods to fit with the SpiLcd interface. To switch, define #BREWPI_SHIFT_LCD 0 in the local config.h