Add contact info and other boilerplate to Jupyter notebooks

[dangunter]

Add contact information and copyright boilerplate to generated notebooks. This should also be used to insert the boilerplate into downloaded notebooks (idaes-pse command idaes get-examples), so a self-contained function that takes a notebook object and modifies it would be ideal.

Here is the text on the main documentation page:

General, background and overview information is available at the IDAES main website. 
Framework development happens at our GitHub repo where you can report issues/bugs or make contributions. 
For further enquiries, send an email to: <[email protected]>

[ksbeattie]

Might we want to ask that enquirers be sent to idaes-users as well?