drop cpdef for exported-only methods, update readme (#11)

* drop cpdef for exported-only methods, update readme

Author: escherba

pip-freeze.txt

@@ -10,7 +10,7 @@ ipdb==0.13.9
 ipython==7.30.1
 jedi==0.18.1
 matplotlib-inline==0.1.3
--e git+https://github.com/escherba/python-metrohash@c6d18bcf22fa6e4a0bc8a98fb8f94f2c60d4f12d#egg=metrohash
+-e git+https://github.com/escherba/python-metrohash@58720ab4383131ba9942cf728f237f0747f5286d#egg=metrohash
 numpy==1.21.5
 packaging==21.3
 parso==0.8.3

setup.py

@@ -82,7 +82,7 @@ def is_pure(self):
         )
 
 
-VERSION = '0.1.0.post5'
+VERSION = '0.1.0.post6'
 URL = "https://github.com/escherba/python-metrohash"