Added arduino-nano to BOARD_INSUFFICIENT_MEMORY/BOARD_BLACKLIST following suit
of how arduino-uno is marked, as arduino-nano is mostly an Uno in a different
form factor.
This release fixed some bugs related to disabling float support in the
parser.
The float support is now optional and can be enabled by including the
tinycbor_float module. This allows for compiling on AVR as that platform
doesn't support the float specific defines used by tinycbor.
