🍰 Added a widget JS deprecation warning!

This is a combination of 9 commits.

Shim IPython.html.widgets
Add flags to widgets install.
Put shim in IPython instead
Add deprecation warning to Javascript source
Move tests
Don't use setting to pass log arround.
Simplify deprecated handler.
Use requirejs to perform redirect.

Author: jdfreder

ipython_widgets/install.py

@@ -3,10 +3,16 @@
 from os.path import dirname, abspath, join as pjoin
 from jupyter_notebook.nbextensions import install_nbextension
 from jupyter_notebook.services.config import ConfigManager
+import argparse
+
+parser = argparse.ArgumentParser(description="Installs the IPython widgets")
+parser.add_argument("-u", "--user", help="Install as current user", action="store_true")
+parser.add_argument("-s", "--symlink", help="Symlink instead of copying files", action="store_true")
+args = parser.parse_args()
 
 print("Installing nbextension ...")
 staticdir = pjoin(dirname(abspath(__file__)), 'static')
-install_nbextension(staticdir, destination='widgets', user=False)
+install_nbextension(staticdir, destination='widgets', user=args.user, symlink=args.symlink)
 
 print("Enabling the extension ...")
 cm = ConfigManager()