Fix for the char and string conversion compile errors present
Merge pull request #83 from anthony-ngu/FixSerialWriteCastIssues

Fix for the char and string conversion compile errors present
fix compilier warnings for radians() and float()
Replace Arduino supplied values with math.h values.
- PI, TWO_PI, HALF_PI
Resolved several /W4 warnings
Merge pull request #85 from zfields/develop

Resolved several /W4 warnings
Fixes to support compatibility
Split Ethernet library into it's own NuGet package.
- bring avr directory reference into NuGet
- add avr/macros.h and avr/interrupt.h files
- add necessary `#include <cstring>` into avr/pgmspace.h
Remove analog `#defines` from Arduino.h in favor of pins_arduino.h
Remove Print.h
Update dependency name