(1) Changed Calibration Module from using service to activity.
(2) Used Weka provided API to construct ARFF file instead of Java.IO
(3) Added Android Plot to display the acceleration data
I am Still having issues with the bin distribution resuls.The bin distributions
are all shown as zero.
(4) Added *.log to gitignore file
Merge branch 'shenglan' of https://github.com/zzzj15/senior_design into shenglan
Fixed the issue with Bin Distribution. Experiencing some problem with Peak Detection. Many of the sensor data come in the same, not suer if this is an issue
Merge remote-tracking branch 'origin/shenglan' into jing

merge changes for binned distribution to work.