install README.md into /usr/share/doc/
Previously it installed README.md into /usr/share/docs/libscfg. With the change it will install into /usr/share/doc/libscfg/README.md
I noticed that this package created a new dir docs in /usr/share/, which isn't the default for installing documentation.
Removed the s from the path and added -t to the install command so it doesn't change the name and extension of the file and instead creates a directory libscfg where it places the "doc".