Merge pull request #70 from Yonghui56/TH2C

Add input file of the benchmark case--"h2_water_2d"
Merge pull request #71 from Yonghui56/TH2C

EOS-functions
correct the format of comments;
fixing several obvious errors.
Merge pull request #1 from HaibingShao/TH2C

Th2 c