Update changelog for release 1.6.3.0
treeae8e20b8b7c851492bbef92bc9f04cc396b85f19
-rw-r--r-- 518 .gitignore
-rw-r--r-- 391 .gitmodules
drwxr-xr-x - Languages
-rw-r--r-- 3438 build.txt
drwxr-xr-x - common
drwxr-xr-x - contrib
drwxr-xr-x - doc
drwxr-xr-x - ext
drwxr-xr-x - src
drwxr-xr-x - test