data_dir as variable
new overviews using word clouds: scaled, grid

The new model overview offers a choice between the old list or one of
two ways of arranging little word clouds for each topic. One uses
topic_scaled.csv, a file of coordinates. The other is simply a grid.

The major changes are in index.js. model_view is reorganized and split
up into several functions. index.html is also changed around in order to
accommodate a nav row of pills for the model subviews.
grid view is more sensible default for overview

if scaled view is missing, disable the button
zooming behavior, other cosmetics

and continued attempts to tune the word-clouds, which sometimes spill
outside of the circles.

partial readme update.

Some improvements to the styling, with the model title back up in the navbar.
more cosmetic tweaking
insert_model working again
readme update
better hovering in overview

brings the mouseover'd circle to the front using a reordering. Fiddled
the highlight color/alpha for clarity.
refinements, plus demo targets
set model title html, not just text

also: two todos
Add a random_placement flag to d3.layout.cloud

Davies's code choose a random starting point for each word, which it then tries to offset to avoid collisions. This works well for lots of words in a big space, which gradually get packed in nicely. For a few words in a small space, I am getting somewhat nicer results by just starting all the words at the center of the cloud and letting the algorithm move them from there. So that is what cloud.random_placement(false) allows.
attempts to fix word-dropping in cloud: fail
simple vertical word stack for topic "clouds"
a few more notes on non-clouds

plus removed d3-cloud mention on about page
trying to squeeze model_view
migrate to bootstrap 3

FIXME: hard-coded SVG sizes
model_view plot aspect ratio; single navbar

the model_view now uses the calculated width of the main container to
get the size of svg.

the sub-navigation in the model view uses a single navbar (saves space)
rescale topic_plot; zoom button disable
topic, doc, word nav items

The topic nav item is a scrolling dropdown of topics.

The document item returns to the last view doc (if any) if clicked
directly.

The word item, if no word is specified, shows a list of all the
vocabulary words.
vocab display on word page

and word view remembers the last word.