Make pip install work.

- Having trouble with recursive dependencies not being installed.
- Try using install_requires in setup.py instead of requirements.txt files.
- Putting back version numbers.

fill3/requirements.txt

@@ -1 +0,0 @@
-./termstr

fill3/setup.py

@@ -8,9 +8,11 @@ except ImportError:
 
 
 setup(name="fill3",
+      version="2021.12.16",
       description=("Fill3 provides basic widgets for a tui."),
       url="https://github.com/ahamilton/eris",
       author="Andrew Hamilton",
       author_email="and_hamilton@yahoo.com",
       license="Artistic 2.0",
-      packages=["fill3"])
+      packages=["fill3"],
+      install_requires=["termstr @ git+https://github.com/ahamilton/eris@2021.12.16#subdirectory=termstr"])