Update README to reflect PyPI availability. Part of #195

README.md

@@ -14,12 +14,37 @@ a statistical automated indexing tool that used metadata from the
 [Finna.fi](https://finna.fi) discovery interface as a training corpus.
 
 This repo contains a rewritten production version of Annif based on the
-[prototype](https://github.com/osma/annif). It is a work in progress.
+[prototype](https://github.com/osma/annif). It is a work in progress, but
+already functional for many common tasks.
 
-## Dependencies
+# Basic install
 
-Python 3.5+. [Pipenv](https://docs.pipenv.org/) is used for managing
-dependencies.
+You will need Python 3.5+ to install Annif.
+
+The recommended way is to install Annif from
+[PyPI](https://pypi.org/project/annif/) into a virtual environment.
+
+    python3 -m venv annif-venv
+    source annif-venv/bin/activate
+    pip install annif
+
+You will also need NLTK data files:
+
+    python -m nltk.downloader punkt
+
+Start up the application:
+
+    annif
+
+See [Getting Started](https://github.com/NatLibFi/Annif/wiki/Getting-started)
+in the wiki for more details.
+
+# Development install
+
+A development version of Annif can be installed by cloning the [GitHub
+repository](https://github.com/NatLibFi/Annif).
+[Pipenv](https://docs.pipenv.org/) is used for managing dependencies for the
+development version.
 
 ## Installation and setup
 
@@ -33,26 +58,26 @@ Install pipenv if you don't have it:
 Install dependencies and download NLTK data:
 
     pipenv install  # use --dev if you want to run tests etc.
-    python -m nltk.downloader punkt
 
 Enter the virtual environment:
 
     pipenv shell
 
+You will also need NLTK data files:
+
+    python -m nltk.downloader punkt
+
 Start up the application:
 
     annif
 
-See [Getting Started](https://github.com/NatLibFi/Annif/wiki/Getting-started)
-in the wiki for more details.
-
 ## Unit tests
 
 Run `pipenv shell` to enter the virtual environment and then run `pytest`.
 To have the test suite watch for changes in code and run automatically, use
 pytest-watch by running `ptw`.
 
-## License
+# License
 
 The code in this repository is licensed under Apache License 2.0, except for the
 dependencies included under `annif/static/css` and `annif/static/js`,