Modernize the build system and the dependencies.

- Use pyproject.toml/flit instead of setup.py
- Use inform instead of nonstdlib.

pyproject.toml

@@ -0,0 +1,42 @@
+[build-system]
+requires = ["flit"]
+build-backend = "flit.buildapi"
+
+[tool.flit.metadata]
+module = "wellmap"
+author = "Kale Kundert"
+author-email = "kale@thekunderts.net"
+home-page = 'https://github.com/kalekundert/wellmap'
+description-file = 'README.rst'
+requires-python = "~=3.6"
+requires = [
+  'pandas',
+  'toml>=0.10',
+  'inform>=1.15',
+  'docopt',      # gui
+  'matplotlib',  # gui
+  'colorcet',    # gui
+]
+classifiers = [
+  'Development Status :: 3 - Alpha',
+  'Intended Audience :: Developers',
+  'License :: OSI Approved :: MIT License',
+  'Natural Language :: English',
+  'Programming Language :: Python :: 3.6',
+  'Topic :: Scientific/Engineering :: Bio-Informatics',
+]
+[tool.flit.metadata.requires-extra]
+docs = [
+  'sphinxcontrib-programoutput',
+  'sphinx_rtd_theme',
+]
+
+[tool.flit.scripts]
+wellmap = "wellmap.verify:main"
+
+[tool.flit.metadata.urls]
+'Documentation' = 'https://wellmap.readthedocs.io/en/latest/'
+'Version Control' = 'https://github.com/kalekundert/wellmap'
+'Bug Tracker' = 'https://github.com/kalekundert/wellmap/issues'
+'Continuous Integration' = 'https://travis-ci.org/kalekundert/wellmap'
+'Test Coverage' = 'https://coveralls.io/github/kalekundert/wellmap'

wellmap/__init__.py

@@ -1,5 +1,9 @@
 #!/usr/bin/env python3
 
+"""\
+File format for 96-well plate layouts.
+"""
+
 __version__ = '0.5.1'
 
 from .util import *

wellmap/load.py

@@ -4,7 +4,7 @@
 import re, itertools
 import pandas as pd
 from pathlib import Path
-from nonstdlib import plural
+from inform import plural
 from copy import deepcopy
 from .util import *
 
@@ -454,7 +454,7 @@ def sanity_check(dim1, *dim2s):
                 and not wells \
                 and not blocks \
                 and not any(config.get(x) for x in dim2s):
-            raise ConfigError(f"Found {plural(config[dim1]):? [{dim1}] spec/s}, but no [{'/'.join(dim2s)}] specs.  No wells defined.")
+            raise ConfigError(f"Found {plural(config[dim1]):# [{dim1}] spec/s}, but no [{'/'.join(dim2s)}] specs.  No wells defined.")
 
     rows = simplify_keys('row')
     cols = simplify_keys('col')

wellmap/verify.py

@@ -60,7 +60,7 @@
 import sys, os
 
 from wellmap import ConfigError
-from nonstdlib import plural
+from inform import plural
 from matplotlib.colors import BoundaryNorm, Normalize
 from pathlib import Path
 from .util import *