Refactoring API, writing docs.

requirements-jupyter.txt

@@ -1,5 +1,6 @@
 -e .[jupyter]
 appnope==0.1.0
+attrs==17.3.0
 bleach==2.1.2
 decorator==4.1.2
 entrypoints==0.2.3
@@ -8,10 +9,10 @@ ipykernel==4.7.0
 ipython-genutils==0.2.0
 ipython==6.2.1
 ipywidgets==6.0.1
-jedi==0.11.0
+jedi==0.11.1
 jinja2==2.10
 jsonschema==2.6.0
-jupyter-client==5.1.0
+jupyter-client==5.2.0
 jupyter-console==5.2.0
 jupyter-core==4.4.0
 jupyter==1.0.0
@@ -21,12 +22,15 @@ nbconvert==5.3.1
 nbformat==4.4.0
 notebook==5.2.2
 pandocfilters==1.4.2
-parso==0.1.0
+parso==0.1.1
 pexpect==4.3.1
 pickleshare==0.7.4
+pluggy==0.6.0
 prompt-toolkit==1.0.15
 ptyprocess==0.5.2
+py==1.5.2
 pygments==2.2.0
+pytest==3.3.1
 python-dateutil==2.6.1
 pyzmq==17.0.0b3
 qtconsole==4.3.1