0) Add time log flag for forcing variables and corresponding codes. Mainly for solar radaition reading. 1) Set LAI/SAI data year range for LAI change simulation; 2) Use the building H/L parameter as default to replace the canyon H/W; 3) A bug fix for leaf temperature iteration calculation. [by @Chen Yang] and 4) some other bugs fix (see below).

0) Add time log flag for forcing variables and corresponding codes. Mainly for solar radaition reading. 1) Set LAI/SAI data year range for LAI change simulation; 2) Use the building H/L parameter as default to replace the canyon H/W; 3) A bug fix for leaf temperature iteration calculation. [by @Chen Yang] and 4) some other bugs fix (see below). #233