Add option to firmware target allowing complete exclusion of Arduino libraries so that only native AVR functionality is used
All compiler include paths are quoted in order to support paths with spaces. Fixes issue #48
Fixed issue #51. SERIAL options was being overwritten.
Updated example
Fixed global upload target, got removed during refactoring
Correct sketch name in example
Ammend variable name from NATIVE_AVR to manual to be consistent with issue #44
Merge remote-tracking branch 'arunh/master' into develop

Conflicts:
	cmake/Platform/Arduino.cmake
Added arunh to the contributors list
Fixed handling of serial command (#51), quotes no longer needed in option
Updated documentation, serial port constant is now called SERIAL_PORT instead of INPUT_PORT
Updated generate_arduino_example option handling, serial command should now work
Updated documentation
Updated documentation
Updated documentation
Fix: script wasn't finding all prototypes and got confused by "else if(var == other) {"
Merge remote-tracking branch 'sebastianherp/master' into develop
 - Fixed line offset when GCC finds error in forward declarations of sketch
 - The sketch option now supports both directory and file paths
 - Updated documentation, and added new troubleshooting subsetion for avr-libc error
Added Sebastian Herp to the list of contributors
Removed debugging information