read me update

Author: fangjian19

README.md

@@ -1,32 +1,33 @@
-The OpenCFD software series is a high-precision computational fluid
-dynamics (CFD) software developed by the team led by Li Xinliang at the 
-Institute of Mechanics, Chinese Academy of Sciences.
 
-It includes the high-accuracy finite difference software OpenCFD-SC 
-(formerly Hoam-OpenCFD), the multi-block structured grid finite volume 
-software OpenCFD-EC, the high-accuracy simulation software for 
-chemically reactive flows OpenCFD-Comb, and the GPU heterogeneous 
-parallel high-precision computation software OpenCFD-SCU.
-The developers have made this software available for use by scientific 
-research and engineering users.
+      The OpenCFD software series is a high-precision computational fluid
+      dynamics (CFD) software developed by the team led by Li Xinliang at the 
+      Institute of Mechanics, Chinese Academy of Sciences.
+      
+      It includes the high-accuracy finite difference software OpenCFD-SC 
+      (formerly Hoam-OpenCFD), the multi-block structured grid finite volume 
+      software OpenCFD-EC, the high-accuracy simulation software for 
+      chemically reactive flows OpenCFD-Comb, and the GPU heterogeneous 
+      parallel high-precision computation software OpenCFD-SCU.
+      The developers have made this software available for use by scientific 
+      research and engineering users.
 
 code upgrade log
-
-2021-03-15: OpenCFD Ver2.0
-2021-03-17: OpenCFD Ver 2.0a, New feature in shock sensor and hybrid 
-            schemes
-2021-03-22: OpenCFD Ver 2.0b, a bug in du_inviscous_Character is removed  
-            Local Lax-Friedrichs splitting is added
-2021-04-05: OpenCFD Ver 2.0c, a bug in read-flate.f90 is remove boundary  
-            condition (random disturbance) is added in  
-            OCFD_Bc_boundarylayers.f90
-2021-05-03: OpenCFD Ver 2.1a, NND-type Boundary scheme is added
-2021-05-10: OpenCFD Ver 2.1b, boundary condition of swept-corner is  
-            modified
-2021-06-08: 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%)
-2021-06-14: OpenCFD Ver 2.2a, Symmetry side-boundary  swept-corner is  
-            supported
-2021-06-22: OpenCFD ver 2.2b, 2nd-order exterpolation Ghost Cell  
-            coordinates
+      
+    2021-03-15: OpenCFD Ver2.0
+    2021-03-17: OpenCFD Ver 2.0a, New feature in shock sensor and hybrid 
+                schemes
+    2021-03-22: OpenCFD Ver 2.0b, a bug in du_inviscous_Character is removed  
+                Local Lax-Friedrichs splitting is added
+    2021-04-05: OpenCFD Ver 2.0c, a bug in read-flate.f90 is remove boundary  
+                condition (random disturbance) is added in  
+                OCFD_Bc_boundarylayers.f90
+    2021-05-03: OpenCFD Ver 2.1a, NND-type Boundary scheme is added
+    2021-05-10: OpenCFD Ver 2.1b, boundary condition of swept-corner is  
+                modified
+    2021-06-08: 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%)
+    2021-06-14: OpenCFD Ver 2.2a, Symmetry side-boundary  swept-corner is  
+                supported
+    2021-06-22: OpenCFD ver 2.2b, 2nd-order exterpolation Ghost Cell  
+                coordinates