Merge branch 'master' of https://github.com/arbox0/MedtronicUploader

- Improve performance

- Stability issues

Solved some issues related to sharedpreferences.

Reconfiguring logback to try to get better logging performance.
Ensure that calibration values are received by all the concurrent threads.
Remove/Hide "Manual Calibration"

patched some minor bugs.

Update warming_up status.

MGB data support added.

First release.