Refactor into latest design decision

C is an implementation detail of the wrapper API, so we go with 'bindings'.
Also create/fix some namespaces.

cryptography/c/__init__.py → cryptography/bindings/openssl/__init__.py

@@ -11,7 +11,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from cryptography.c.api import api
+from cryptography.bindings.openssl import api
 
 
 __all__ = ["api"]

cryptography/c/api.py → cryptography/bindings/openssl/api.py

@@ -15,7 +15,9 @@
 
 
 class API(object):
-    """OpenSSL API wrapper."""
+    """
+    OpenSSL API wrapper.
+    """
 
 
 api = API()

tests/bindings/test_openssl.py

@@ -0,0 +1,19 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from cryptography.bindings.openssl import api
+
+
+class TestOpenSSL(object):
+    def test_api_exists(self):
+        assert api