DIST: single-source version w/o breaking pip install -e .

Closes odlgroup#1486

MANIFEST.in

@@ -1,8 +1,13 @@
 include CONTRIBUTING.md
 include LICENSE
 include README.md
+include VERSION
 include setup.cfg
 include setup.py
 include odl/pytest.ini
+exclude .*
 recursive-include odl/test test*.py *test.py
+prune conda
+prune doc
 prune examples
+prune tools

VERSION

@@ -0,0 +1 @@
+1.0.0.dev0

odl/__init__.py

@@ -13,23 +13,32 @@
 """
 
 from __future__ import absolute_import
+
+from os import pardir, path
+
 import numpy as np
 
-__version__ = '1.0.0.dev0'
-__all__ = ('set',
-           'space',
-           'operator',
-           'discr',
-           'contrib',
-           'deform',
-           'diagnostics',
-           'phantom',
-           'solvers',
-           'tomo',
-           'trafos',
-           'ufunc_ops',
-           'util',
-           )
+__all__ = (
+    'set',
+    'space',
+    'operator',
+    'discr',
+    'contrib',
+    'deform',
+    'diagnostics',
+    'phantom',
+    'solvers',
+    'tomo',
+    'trafos',
+    'ufunc_ops',
+    'util',
+)
+
+# Set package version
+curdir = path.abspath(path.dirname(__file__))
+
+with open(path.join(curdir, pardir, 'VERSION')) as version_file:
+    __version__ = version_file.read().strip()
 
 # Set old Numpy printing behavior as to not invalidate all doctests.
 # TODO(kohr-h): switch to new behavior when Numpy 1.14 is minimum

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = odl
-version = attr: odl.__version__
+version = file: VERSION
 description = Operator Discretization Library
 long_description = file: README.md
 long_description_content_type = text/markdown
@@ -38,6 +38,7 @@ classifiers =
 [options]
 packages = find:
 install_requires =
+    setuptools >=39.2.0
     future >=0.14
     packaging >=15.0
     numpy >=1.10,!=1.14.0,!=1.14.1,!=1.14.2
@@ -51,7 +52,7 @@ include_package_data = True
 
 [options.packages.find]
 exclude =
-    docs
+    doc
     examples
 
 [options.package_data]