added missing files, and updated manifest and setup script

MANIFEST.in

@@ -3,3 +3,4 @@ include src/*.c
 include include/*.h
 include README.md
 include VERSION
+include requirements.txt
\ No newline at end of file

setup.py

@@ -157,7 +157,7 @@ BINARY_C_DEFINES = call_binary_c_config(BINARY_C_DIR, "define_macros")
 BINARY_C_DEFINE_MACROS = []
 LONE = re.compile("^-D(.+)$")
 PARTNER = re.compile("^-D(.+)=(.+)$")
-for x in DEFINES:
+for x in BINARY_C_DEFINES:
     y = PARTNER.match(x)
     if y:
         BINARY_C_DEFINE_MACROS.extend([(y.group(1), y.group(2))])
@@ -262,7 +262,7 @@ setup(
         "binarycpython.tests",
         "binarycpython.tests.tests_population_extensions",
     ],
-    install_requires=,
+    install_requires=requirements(this_file_dir),
     include_package_data=True,
     ext_modules=[BINARY_C_PYTHON_API_MODULE],  # binary_c must be loaded
     classifiers=[