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Maybe add support for ADC hardware oversampling?

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Adding hardware oversampling would be realy easy and would make it more easy use this feature with Energia

it's exacly the same as analogRead but you would need to add 


uint16_t analogRead(uint8_t pin) {
uint16_t analogReadOverSample(uint8_t pin,uint8_t factor) {
uint16_t _analogRead(uint8_t pin,uint8_t factor) {
    uint8_t port = digitalPinToPort(pin);
    uint16_t value[1];
    uint32_t channel = digitalPinToADCIn(pin);
    if (channel == NOT_ON_ADC) { //invalid ADC pin
        return 0;
    ROM_GPIOPinTypeADC((uint32_t) portBASERegister(port), digitalPinToBitMask(pin));
    ROM_ADCSequenceConfigure(ADC0_BASE, 3, ADC_TRIGGER_PROCESSOR, 0);
    ROM_ADCSequenceStepConfigure(ADC0_BASE, 3, 0, channel | ADC_CTL_IE | ADC_CTL_END);
    ROM_ADCSequenceEnable(ADC0_BASE, 3);
    ROM_ADCIntClear(ADC0_BASE, 3);
    ROM_ADCProcessorTrigger(ADC0_BASE, 3);
    while(!ROM_ADCIntStatus(ADC0_BASE, 3, false)) {
    ROM_ADCIntClear(ADC0_BASE, 3);
    ROM_ADCSequenceDataGet(ADC0_BASE, 3, (unsigned long*) value);
    return value[0];
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