Switch from pysha3 to pycryptodome

Author: carver

Diff for: requirements-docs.txt

@@ -12,7 +12,6 @@ contextlib2>=0.5.4
 ethtoken
 py-geth>=1.4.0
 py-solc>=0.4.0
-#pysha3>=0.3
 pytest>=2.7.2
 sphinx
 sphinx_rtd_theme>=0.1.9

Diff for: setup.py

@@ -23,7 +23,7 @@
         "eth-utils>=1.0.0b1,<2.0.0",
         "hexbytes>=0.1.0b1,<1.0.0",
         "lru-dict>=1.1.6,<2.0.0",
-        "pysha3>=1.0.0,<2.0.0",
+        "eth-hash[pycryptodome]",
         "requests>=2.16.0,<3.0.0",
     ],
     setup_requires=['setuptools-markdown'],