Merge pull request #9 from tician/master

OK!!!
Fixed several issues in pypose.ino and two in HaViMo2.cpp.  The current version of PyPose does not necessarily wait long enough for a proper response over USB after issuing the ARB_LOAD_POSE packet.  Somewhat fixed in a fork that may get pulled into the upstream "vanadium labs" repo.
Forgot to mention in last commit:
Dxl object now permits user to easily configure the library for number of txrx attempts and any status return level setting, hopefully.  Not yet tested with servos configured to 0 or 1, but everything continues to work fine with servos at 2.  Defaults are one txrx attempt and return level 2.