L3G4200D library conflicts with published of same name

[lnigra]

0d8343d added an original library of same name as previously published library https://github.com/pololu/l3g4200d-arduino for Pololu breakout board. Needs to be renamed to L3G4200DFH.

[RileyPierce]

Renaming library tonight.... Calling it L3G4200D_I2C to differentiate it. As discussed in email, naming it _FH is not appropriate because this is not a FH modification of an existing library, but rather an entirely new library.

[RileyPierce]

Pull request created. Please apply the pull request and close the ticket.