initial connectivity to zephyr device
request and process serial number.  request and process ECG trace
removes extraneous imports
updated build scripts
Merge branch 'zephyr' of ssh://arvi.mgh.harvard.edu/opt/git/mdpnp

# By Jeff Plourde (3) and Diego (1)
# Via Diego
* 'zephyr' of ssh://arvi.mgh.harvard.edu/opt/git/mdpnp:
  updated build scripts
  removes extraneous imports
  request and process serial number.  request and process ECG trace
  initial connectivity to zephyr device