Compatibility for pip 10

- also some spaces and tabs fixes

setup.py

@@ -1,14 +1,17 @@
 # -*- coding: utf-8 -*-
 from setuptools import setup, find_packages
-from pip.req import parse_requirements
+try: # for pip >= 10
+	from pip._internal.req import parse_requirements
+except ImportError: # for pip <= 9.0.3
+	from pip.req import parse_requirements
 import re, ast
 
 # get version from __version__ variable in erpnext/__init__.py
 _version_re = re.compile(r'__version__\s+=\s+(.*)')
 
 with open('erpnext/__init__.py', 'rb') as f:
-    version = str(ast.literal_eval(_version_re.search(
-        f.read().decode('utf-8')).group(1)))
+	version = str(ast.literal_eval(_version_re.search(
+		f.read().decode('utf-8')).group(1)))
 
 requirements = parse_requirements("requirements.txt", session="")