added requirements.txt & shifted pmi now with k=1 (no shifting, better results)

setup.py

@@ -3,6 +3,9 @@ from setuptools import setup
 with open("README.md", "r") as fh:
     long_description = fh.read()
 
+with open("requirements.txt", "r") as f:
+    required = f.read().splitlines()
+
 setup(name='svd2vec',
       version='0.2',
       description='A library that converts words to vectors using PMI and SVD',
@@ -17,5 +20,6 @@ setup(name='svd2vec',
       classifiers=[
                   "Programming Language :: Python :: 3",
                   "License :: OSI Approved :: MIT License",
-                  "Operating System :: OS Independent",]
+                  "Operating System :: OS Independent"],
+      install_requires=required
       )

svd2vec/core.py

@@ -79,7 +79,7 @@ class svd2vec:
                  window=10,
                  dyn_window_weight=WINDOW_WEIGHT_WORD2VEC,
                  cds_alpha=0.75,
-                 neg_k_shift=5,
+                 neg_k_shift=1,
                  eig_p_weight=0,
                  nrm_type=NRM_SCHEME_ROW,
                  sub_threshold=1e-5,