Changes done in ECG and BT

Dependencies:   SDFileSystem ds3231 eeprom_Nikita mbed testUniGraphic_150217

Fork of merged_code2_20sept_2017_4th_oct_2017 by nikita teggi

Revision:
10:aeff3309002a
Parent:
7:11f926351d8f
Child:
11:9a6545c2eb5d