prototype balloonduino library

[zacharyburnett]

DONE

• Removed submodule
• Removed MARS and CAMERAPAYLOAD elements
• fixed #ifndef checks
• renamed some definitions to be more user friendly
• renamed library files from Balloonduino_lib. to just Balloonduino.
• added Balloonduino.ino for testing

TODO

1. test it
2. general xbee functions
3. refactor with verbosity and document for future users / developers

[nmrossomando]

Macros are handled in compilation, so they can't be user settable. You could move to globals, but that's also not a wonderful solution since it's possible to accidentally reassign them. #ifndefs are a decent solution but definitely do need to be commented to the functionality is understood/the user knows how to change them.

Another possible solution is a global class which protects the variables, so you do something like XBee_vars.set(val) to set it and XBee_vars.get(val) to use the value, so there's no way for an accidental reset.

Hope y'all don't mind me throwing in my two cents, as I still get the Github emails :P

[zacharyburnett]

I changed the #defines to global bools and added a bunch of params to begin()

[zacharyburnett]

pulling current changes into master to work on new problem in develop