Update build instructions

Author: stevenbird

Makefile

@@ -36,15 +36,8 @@ demotest:
 # DISTRIBUTIONS
 ########################################################################
 
-dist: zipdist
-
-# twine only permits one source distribution
-#gztardist: clean_code
-#	$(PYTHON) setup.py -q sdist --format=gztar
-zipdist: clean_code
-	$(PYTHON) setup.py -q sdist --format=zip bdist_wheel
-windist: clean_code
-	$(PYTHON) setup.py -q bdist --format=wininst --plat-name=win32
+dist: clean_code
+	$(PYTHON) -m build
 
 ########################################################################
 # CLEAN

RELEASE-HOWTO.txt

@@ -5,7 +5,7 @@ Building an NLTK distribution
    - py312-pytest py312-requests py312-sphinx
    - py312-numpy py312-matplotlib py312-tkinter
    - sqlite3-tcl
-   - pip install sphinxcontrib-apidoc twython
+   - pip install sphinxcontrib-apidoc twython build twine
 
 1. Testing
    - Check no errors are reported in our continuous integration service:
@@ -81,5 +81,5 @@ The build requires docutils, pdflatex, python imaging library, epydoc,
   cdrtools, ImageMagick
 
   1. Check out a clean copy of the subversion repository (or make clean)
-     and install locally with sudo python setup.py install; make clean
+     and install locally with pip install; make clean
   2. make doc (slow; see doc/ for the results) and commit