Update update_copyright.py to handle several comment characters.
-rw-r--r-- 28 .gitignore
-rw-r--r-- 35147 COPYING
-rw-r--r-- 981 DEPENDENCIES
-rw-r--r-- 4655 README
drwxr-xr-x - bin
drwxr-xr-x - chemdb
drwxr-xr-x - contrib
drwxr-xr-x - example
drwxr-xr-x - template
-rwxr-xr-x 22407 update_copyright.py