1mb packet transfer test. rcvPkt() reports length of data.
Type fix in xbmain.cpp
xbmain.cpp now performs a 100kb transfer test.
Adjusted xbeeDMapi::zeroPktStruct() to be a static function, to conserve memory.
Merge branch 'testing'

Merging the data transfer test due to minor changes in xbeeDMapi and since it is working.
xbeeDMapi -- changed zeroPktStruct to a static function to conserve memory.