requirements for docs

README.md

@@ -23,7 +23,10 @@ missing.
 
 In **django-SHOP** implementations, the product models reflect their pysical properties making it
 possible to create complete and deep hierarchies of variations, but without having to fiddle with
-unneeded properties.
+unneeded properties. It furthermore avoids the need for an
+[Entity Attribute Value Model](https://en.wikipedia.org/wiki/Entity–attribute–value_model), which
+is considered a database anti-pattern, because it produces far too many table joins, when filtering
+by property.
 
 
 ## Don't build pages using hard-coded templates – compose them

docs/requirements.txt

@@ -0,0 +1,38 @@
+alabaster==0.7.12
+atomicwrites==1.3.0
+attrs==18.2.0
+babel==2.6.0
+bleach==3.1.0
+certifi==2018.11.29
+chardet==3.0.4
+coverage==4.5.2
+docutils==0.14
+filelock==3.0.10
+idna==2.8
+imagesize==1.1.0
+jinja2==2.10
+markupsafe==1.1.0
+more-itertools==6.0.0; python_version > '2.7'
+packaging==19.0
+pkginfo==1.5.0.1
+pluggy==0.8.1
+py==1.7.0
+pygments==2.3.1
+pyparsing==2.3.1
+pytest-django==3.4.3
+pytest==4.3.0
+pytz==2018.9
+readme-renderer==24.0
+requests-toolbelt==0.9.1
+requests==2.21.0
+six==1.12.0
+snowballstemmer==1.2.1
+sphinx==1.8.4
+sphinxcontrib-websupport==1.1.0
+toml==0.10.0
+tox==3.7.0
+tqdm==4.31.1
+twine==1.13.0
+urllib3==1.24.1
+virtualenv==16.4.0
+webencodings==0.5.1