0.2.0+nv21.02

0.2.0 release of lspvic/jupyter_tensorboard , plus:

• Drop reimplementations of standard_tensorboard_wsgi; fixes integration with TB2.2 .. TB2.4
• Allow use of dynamic plugins as well as the standard ones; fixes issue with Projector and DLProf plugins
• Don't append ? to path if query string is empty; fixes issue with DLProf
• Workaround TensorBoard /font-roboto/ path prefix bug