Dependencies of RTC_w_COM

A dependency is a program or library which this program uses. When you import this program, the dependencies are automatically imported.

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
In TextLCD_I2C_N Class, added void setContrast(unsigned char c) function as temporary. This is for ST7032i non-volume type contrast control.
Checking program for RTC module inside CPU. F401RE, F411RE, L152RE, RTC, Timeout, X2