Made changes to support Arduino 1.5.8 with Connectivity Abstraction.

Made changes to support Arduino 1.5.8 with Connectivity Abstraction.

Since the CA Layer assumes version 1.5.8 of Arduino, our original
makefile implementation had to be updated to match this.

Since the directory structure is mildly different between 1.0.5 and
1.5.8, these changes were necessary that are found in
arduinomega.proerties.

Due to casting errors, source code was updated accordingly.

Change-Id: Ib8f68fa9dd4f14af2dfadbeac2f0d85cc0d292d4
Signed-off-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/34
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Sashi Penta <sashi.kumar.penta@intel.com>
Reviewed-by: Sudarshan Prasad <sudarshan.prasad@intel.com>