Add support for analogRead/Write,map and Serial objects

[sparkslabs]

Target is the desire to be able to write code that looks like this:

analogInPin = A0
analogOutPin = 9
sensorValue = 0
outputValue = 0
Serial.begin(9600)

while True:
    sensorValue = analogRead(analogInPin)
    outputValue = map(sensorValue, 0, 1023, 0, 255)
    analogWrite(analogOutPin, outputValue)
    Serial.print("sensor = ")
    Serial.print(sensorValue)
    Serial.print("\t output = ")
    Serial.println(outputValue)
    delay(2)

This requires the following:

• Support for profile defined variables : A0
• Support for profile defined objects : Serial with methods - begin, print, println, begin
• Support for profile defined functions/function calls that return values : analogRead, map
• analogWrite should currently work in this context, but needs checking.

[sparkslabs]

Support for profile defined variables : A0

• Done. (0.1.23)
  Support for profile defined objects : Serial with methods - begin, print, println, begin
• Done. (0.1.23)
  Support for profile defined functions/function calls that return values : analogRead, map
• Done (0.1.23)
  analogWrite compiles correctly (0.1.23)

Also, from (0.1.23) release notes:

Arduino Support

Specific set of functionality checked/added in this release:

• Serial support - .begin(), .print(), .println()
• constrain
• map
• random, randomSeed
• analogWrite
• analogRead
• millis
• Support for constants/ids : A0-A7, HIGH, LOW, INPUT, OUTPUT

This is in addition to other previous functionality like: Servos, Digital IO, time delays, etc