version 0.0.1.5

Date: 17 May 2014
Description: still under construction...
known issue: The Gyro factor GYR_CMPF_FACTOR has to be 2 for proper
reading, which suggest another data conversion issue. The first issue in
gyro was in the raw data and has been solved by adding strong typing
integer16 in casting.
enhancement: calling wire_due has been optimized by data types to avoid
unnecessary intermediate functions. execution time is no 1.4ms rather
than 4+ms