Added a column-oriented table class

No it doesn't work yet
Introducing typed tables

Needs some further cleanup but effective!
Probe-based implicit sampling correction

Prior to sampling implicit surfaces, a small probe sample is launched.
The seed points are then generated around the mean of the probed points
rather than around zero.
Also removed some debugging console logs.
Optimized implicit sampling

Mostly object reusing. Huge, huge performance gains.
Also added a proxy for undefined columns in table.
Bugfixes

Bug1: resizing tables after multiplication results in cropping at the
old length.
Bug2: binding a context to a graph with no panel throws an error no
more.
Added memoization to text label generation

Should be good for performance
Forwarding axis updates

* Axis updates applied to Panel are translated all the way to the
contexts.
* Related: a Graph can now issue only one DataInterface.
* Unrelated: the tables are now allocated empty to avoid allocationg
tables too big (should precalculate the final size, actually)
* Unrelated: removed ST(). It's not necessary now that I know of
Date.now().
* Removed a console.log from newton.
Added to-do list.