Coding Style.

- Move terminal.py from termstr package to fill3 package.
- Terminal was no longer used by termstr.
- Terminal could be in its own package in future.

eris/__main__.py

@@ -40,9 +40,9 @@ import eris.tools as tools
 import eris.worker as worker
 import eris.paged_list as paged_list
 import fill3
+import fill3.terminal as terminal
 import sorted_collection
 import termstr
-import termstr.terminal as terminal
 
 
 USAGE = """