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:
14:f5c62d30c6fc
Parent:
13:5d3b478ea9c7
Child:
15:208b146151ba