add tools section

[vlandham]

tools can encompass future directions for the up-and-coming JS data analyzer.

random thoughts on what it could include:

• turf.js - for spatial data
• https://github.com/nathanepstein/datakit - recommended by https://twitter.com/farrelldlfarrel

[iros]

Other tools I've seen:

Libraries:

• https://github.com/syntagmatic/underscore.math
• http://mathjs.org/
• https://github.com/numbers/numbers.js
• http://www.numericjs.com/ - more complicated things (like linear algebra)
• http://worrydream.com/Tangle/ - possibly a stretch?
• http://openexchangerates.github.io/accounting.js/ - currency formatting
• http://misoproject.com/dataset - basic querying and summarization + extensibility (shameless self promotion)

[vlandham]

these are all awesome!!

should we try to sub-categorize, or just leave them in a semi-sorted list?

[iros]

We could sub categorize under: Libraries & Tools? I feel like OpenRefine is a tool, so separating that might be useful. I haven't made that list yet

[grssnbchr]

Another useful library is http://square.github.io/crossfilter/, it allows multidimensional grouping, sorting and filtering.