Enabled pure-python build

Makefile

@@ -19,11 +19,20 @@ create_symlinks:
 	-ln -s ../RNS ./Examples/
 	-ln -s ../../RNS ./RNS/Utilities/
 
+build_sdist_only:
+	python3 setup.py sdist
+
 build_wheel:
 	python3 setup.py sdist bdist_wheel
 
-release: test remove_symlinks build_wheel create_symlinks
+build_pure_wheel:
+	python3 setup.py sdist bdist_wheel --pure
+
+release: remove_symlinks build_wheel build_pure_wheel create_symlinks
 
 upload:
+	@echo Ready to publish release, hit enter to continue
+	@read VOID
 	@echo Uploading to PyPi...
 	twine upload dist/*
+	@echo Release published

setup.py

@@ -2,6 +2,8 @@ import setuptools
 import sys
 
 pure_python = False
+pure_notice = "\n\n**Warning!** *This package is the zero-dependency version of Reticulum. You should almost certainly use the [normal package](https://pypi.org/project/rns) instead. Do NOT install this package unless you know exactly why you are doing it!*"
+
 if '--pure' in sys.argv:
     pure_python = True
     sys.argv.remove('--pure')
@@ -15,6 +17,7 @@ with open("README.md", "r") as fh:
 if pure_python:
     pkg_name = "rnspure"
     requirements = []
+    long_description = long_description.replace("</p>", "</p>"+pure_notice)
 else:
     pkg_name = "rns"
     requirements = ['cryptography>=3.4.7', 'pyserial>=3.5', 'netifaces']