Fix install_requires

See https://caremad.io/2013/07/setup-vs-requirement/ for more info
* Move list of requirements to setup.py
* Remove use of parse_requirements() which changed in latest pip release

Change-Id: I79002cc8377ee0d13b3f6a732eea4aeef075dfe1

requirements.txt

@@ -1,2 +1 @@
-ply
-six>=1.5.2
+-e .

setup.py

@@ -1,5 +1,4 @@
 import os
-from pip.req import parse_requirements
 from setuptools import setup, find_packages
 
 
@@ -20,11 +19,6 @@ and can be safely read from a config file or user input.
 Read README.md for syntax and examples.
 """
 
-
-req_file = os.path.join(os.path.dirname(__file__), "requirements.txt")
-install_reqs = [str(r.req) for r in parse_requirements(req_file)]
-
-
 setup(
     name='timex',
     version='0.10.0',
@@ -45,7 +39,11 @@ setup(
     url='https://github.com/StackTach/timex',
     scripts=[],
     long_description=desc,
-    install_requires=install_reqs,
+    install_requires=[
+        "ply",
+        "six >= 1.5.2",
+    ],
+
 
     zip_safe=False
 )