Move SoftwareSerial TX and RX pin setup from constructor to begin#4092

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sandeepmistry wants to merge 2 commits intoarduino:masterfrom

sandeepmistry:software-serial-begin-pin-setup

Commits on Nov 5, 2015

Move SoftwareSerial TX and RX pin setup from constructor to begin as per #3041
sandeepmistry
committed

Commits on Nov 6, 2015

Change type of receivePin and transmitPin to int to remove some warnings
sandeepmistry
committed