Temperature component

The equations (S-13, S-14), (S-23,..., S-28), (S-36, S-37), (S-43, S-44), and (S-80,..., S-91) have been multiplied by corresponding temperature factors φ. The φ equation is defined in temperature_factor.cellml. The reference temperature T0 for ICaL is 310 K, while ICaT is constructed based on 297 K. The reference temperatures T0 for other currents are 297 K. The Q10 coefficients for calcium, potassium and sodium channels are 2.1, 3.1 and 2.45 respectively.