Use wrapper `cdiff` instead of symlink for future unit test; doc update

.gitignore

 *.pyc
 *~
 /MANIFEST
-/cdiff
 /build/
 /cdiff.egg-info/
 /dist/

CHANGES

 Change log
 ==========
 
+Version 0.4 (2013-02-16)
+
+  - New option *-c WHEN* (*--color WHEN*) to support auto test
+  - Auto regression test now on Travis
+
 Version 0.3 (2013-02-07)
 
   - Support compare two files (wrapper of diff)

MANIFEST.in

 include README.rst
 include tests/*
 include tests/*/*
-exclude cdiff

Makefile

 	tests/regression.sh
 
 clean:
-	rm -f cdiff MANIFEST
+	rm -f MANIFEST
 	rm -rf build/ cdiff.egg-info/ dist/ __pycache__/
 
 build:

README.rst

 
 .. code:: sh
  
-    sudo pip install cdiff
+    pip install --upgrade cdiff
 
 Install with setup.py
 ~~~~~~~~~~~~~~~~~~~~~
 
     git clone https://github.com/ymattw/cdiff.git
     cd cdiff
-    sudo ./setup.py install
+    ./setup.py install
 
 Download directly
 ~~~~~~~~~~~~~~~~~
 
 .. code:: sh
 
-    svn diff | cdiff -s > my.patch
+    svn diff -r PREV | cdiff -s > my.patch
 
 Notes
 -----

cdiff

+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import sys
+import cdiff
+
+try:
+    sys.exit(cdiff.main())
+except:
+    sys.exit(1)
+
+# vim:set et sts=4 sw=4 tw=80:

cdiff.py

 """
 
 META_INFO = {
-    'version'     : '0.3',
+    'version'     : '0.4',
     'license'     : 'BSD-3',
     'author'      : 'Matthew Wang',
     'email'       : 'mattwyl(@)gmail(.)com',
 import sys
 
 if sys.hexversion < 0x02050000:
-    sys.stderr.write("*** Requires python >= 2.5.0\n")
-    sys.exit(1)
+    raise SystemExit("*** Requires python >= 2.5.0")
 IS_PY3 = sys.hexversion >= 0x03000000
 
 import os

setup.py

 #!/usr/bin/env python
+# -*- coding: utf-8 -*-
 
 from __future__ import with_statement
 from distutils.core import setup
 import os
 from cdiff import META_INFO as _meta
 
-# Create symlink so that to use 'scripts' w/o '.py'
-link_name = 'cdiff'
-if os.path.exists(link_name):
-    os.unlink(link_name)
-os.symlink('cdiff.py', link_name)
+import sys
+if sys.hexversion < 0x02050000:
+    raise SystemExit("*** Requires python >= 2.5.0")
 
 with open('README.rst') as doc:
     long_description = doc.read()
         'Operating System :: Unix',
         'Programming Language :: Python',
     ],
-    packages = [],
     py_modules = ['cdiff'],
-    scripts = [link_name],
+    scripts = ['cdiff'],
 )
+
+# vim:set et sts=4 sw=4 tw=80:

tests/regression.sh

 set -o errexit
 
 SELF_DIR=$(cd $(dirname $0) && pwd) || exit 1
-CDIFF=$SELF_DIR/../cdiff.py
+CDIFF=$SELF_DIR/../cdiff
 
 function pass()
 {