Coding style.

- Break out termstr, fill3, sorted_collection and lscolors into
  seperate packages and modules.

setup.py

@@ -14,7 +14,8 @@ setup(name="eris",
       url="https://github.com/ahamilton/eris",
       author="Andrew Hamilton",
       license="Artistic 2.0",
-      packages=["eris"],
+      packages=["eris", "termstr"],
+      py_modules=["fill3", "lscolors", "sorted_collection"],
       package_data={"eris": ["LS_COLORS.sh", "tools.toml"]},
       entry_points={"console_scripts":
                     ["eris=eris.__main__:entry_point",