Fix formula highlighting in Safari.

This closes #2.
Improve query examples.

Closes #3.
Switch to mwsq LaTeXML profile.
Allow param "query" when "query-math" not present.

The old MWS interface uses "query" as query parameter for the Math
query, hence it makes sense if there is no "query-math" parameter
to fallback to "query".
Increased preview size
Create MathHub TeMa search UI.
Fixed gitignore.
Merge branch 'master-mathhub'
Updated config and added an MMT engine
Re-enable examples and move to arxiv title.
Ensure UTF-8 encoding.