Move version definition to dkim_milter/__init__.py and improve setup.py requirements

CHANGES

@@ -1,8 +1,11 @@
 
-0.9.1 UNRELEASED
+0.9.1 2018-02-17
  - DKIM signing and verification using both RSA and Ed25519
  - The following configuration options are supported (same definition as
    OpenDKIM): Domain, KeyFile, KeyFileEd25519, Mode, PidFile, Selector,
    Socket, Syslog, UMask, and UserID (see dkimpy-milter.conf.5)
  - This is an Alpha grade release and while the implemented features work, it
    is nowhere near being a complete package
+
+0.9.2 UNRELEASED
+ - Improved pakcage requirements definition

dkimpy_milter/__init__.py

@@ -40,6 +40,7 @@ from dkimpy_milter.util import setExceptHook
 from dkimpy_milter.util import write_pid
 from dkimpy_milter.util import read_keyfile
 
+__version__ = "0.9.2"
 FWS = re.compile(r'\r?\n[ \t]+')
   
 class dkimMilter(Milter.Base):

setup.py

@@ -18,12 +18,13 @@
 
 from setuptools import setup
 import os
+import dkimpy_milter
 
 description = "Domain Keys Identified Mail (DKIM) signing/verifying milter for Postfix/Sendmail."
 
 setup(
     name='dkimpy-milter',
-    version='0.9.1',
+    version=dkimpy_milter.__version__,
     author='Scott Kitterman',
     author_email='scott@kitterman.com',
     url='https://launchpad.net/dkimpy-milter',
@@ -51,6 +52,6 @@ setup(
     data_files=[(os.path.join('share', 'man', 'man5'),
         ['man/dkimpy-milter.conf.5']), ('etc', ['etc/dkimpy-milter.conf'])],
 
-    install_requires = ['dkimpy', 'pymilter', 'authres>=1.0.2'],
+    install_requires = ['dkimpy>=0.7', 'pymilter', 'authres>=1.0.2', 'nacl'],
     zip_safe = False,
 )