[MRG] Updates to poincare notebooks

[jayantj]

Makes the following updates to the tutorial notebook -

1. Removes minute technical details and evaluation results
2. Adds links to detailed blog post and other useful links

Evaluation notebook -

1. Adds results for regularized models
2. HTML tables instead of ascii-tables to easily publish in blogs.

[janpom]

This looks good. One minor thing: The "Dimensions" label is off in the results table. It should span all the dimension columns and shouldn't span the "Metric" column.

[menshikh-iv]

@jayantj

• "Note that not all the above libraries are part of the gensim dependencies, so they might need to be installed separately. These requirements are listed in the poincare requirements.txt" - please add cell with pip install ... line instead (this file already does not exist)
• This is the second rename evaluation -> tutorial -> evaluation, please explain what is happening

[jayantj]

@menshikh-iv do you mean I should hardcode the pip installs in the notebook itself?
Regarding rename: this PR doesn't actually rename anything, it looks like it has been removed because it removes a lot of the plotly graphs from tutorial. The tutorial notebook and evaluation notebook both still exist.

[menshikh-iv]

@jayantj yes, this is simpler and easy-to-edit if needed.