updated top-level README and version_decl for V4.5 (#1847)
tree96684a4f09c7a400a6efade0a3f5e6ca2697e157
drwxr-xr-x - .github
-rw-r--r-- 998 .gitignore
-rw-r--r-- 84 .gitmodules
-rw-r--r-- 1027 LICENSE.txt
-rw-r--r-- 57894 Makefile
-rw-r--r-- 17697 README
-rw-r--r-- 1151 README.md
drwxr-xr-x - Registry
drwxr-xr-x - arch
drwxr-xr-x - chem
-rwxr-xr-x 4023 clean
-rwxr-xr-x 17078 compile
-rwxr-xr-x 38010 configure
drwxr-xr-x - doc
drwxr-xr-x - dyn_em
drwxr-xr-x - external
drwxr-xr-x - frame
drwxr-xr-x - hydro
drwxr-xr-x - inc
drwxr-xr-x - main
drwxr-xr-x - phys
drwxr-xr-x - run
drwxr-xr-x - share
drwxr-xr-x - test
drwxr-xr-x - tools
drwxr-xr-x - var
drwxr-xr-x - wrftladj