2021-3-15： OpenCFD Ver2.0
2021-3-17: OpenCFD Ver 2.0a, New feature in shock sensor and hybrid schemes
2021-3-22: OpenCFD Ver 2.0b, a bug in du_inviscous_Character is removed
Local Lax-Friedrichs splitting is added
2021-4-5： OpenCFD Ver 2.0c, a bug in read-flate.f90 is remove
boundary condition (random disturbance) is added in OCFD_Bc_boundarylayers.f90
2021-4-20： OpenCFD Ver 2.1， bounary condition of swept-corner is added
2021-5-3： OpenCFD Ver 2.1a, NND-type Boundary scheme is added
2021-5-10： OpenCFD Ver 2.1b, boundary condition of swept-corner is modified
2021-6-8： OpenCFD Ver 2.2, Ghost-Cell type boundary condition is supported
Small revision in OCFD2d_flux1( ) , OCFD2d_flux2( ) and flux_charteric( ), to inprove efficient (fast 4%)
2021-6-14：OpenCFD Ver 2.2a, Symmetry side-boundary swept-corner is supported
2021-6-22： OpenCFD ver 2.2b, 2nd-order exterpolation Ghost Cell coordinates