Heplist - Display properties of known particles

Hi again,

this is an implementation of https://duckduckhack.uservoice.com/forums/5168-ideas-for-duckduckgo-instant-answer-plugins/suggestions/3809292-properties-of-particles-elementary-meson-baryon

I guess the data mining is nearly done, I have sent it to some friends for beta testing. There is one thing still on my todo list: Since the data is published once a year, there is still a year in the download string for the mass file in fetch.sh - I have to see if there's a generic link... (it's not the current year, 2013 data is not published yet!).

Next point why I submitted this pull request already is that I'm not sure about how to display the data yet - until now only comma separated text... Can I use HTML in the abstract (for nicer display as well as subscripts, etc)?

Next: How does the query matching work?
eg: Title is `top`. Does this match `top quark`, `top particle` as well as `top-quark` ?

Thanks :)