Per-Library History & Active File

Moves  history and  active files into  library, giving  each
library  its  own  history  and  active files. Config  files
continue to be per-user.

TODO: Implement support for multiple libraries.

 On branch master
 Your branch is up-to-date with 'origin/master'.

 Changes to be committed:
	modified:   4csr
	modified:   README