Add top level import ability (#33)

Author: juliusgeo

changelog.rst

@@ -0,0 +1,11 @@
+=========
+Changelog
+=========
+
+Changes in version 1.1.0
+------------------------
+- ``ExplainCollection`` now importable from top level like so: ``from pymongoexplain import ExplainCollection``
+
+Changes in version 1.0.0
+------------------------
+- Initial ``ExplainCollection`` API

pymongoexplain/__init__.py

@@ -11,3 +11,5 @@
 # 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 pymongoexplain.explainable_collection import ExplainCollection