Rev 2.0.0 Release

Rev 2.0.0 of this library some minor API change (and thus the new major rev), and some new features, including:

• Better-documentation, including generated GIF images of what the display would do with the code ran
• Fixed pgm_read_byte for other non-AVR cores
• Removed rotateIndividualDislay from the setup class, it's called as it's own function
• Added an option for vertical displays
• Fixed some SPI settings
• Added the following new functions:
  • setRowPixel
  • clearRowPixel
  • setColumnPixel
  • clearColumnPixel