remove obsolete cell param

this was a leftover artifact of when wdcplot had to do stuff in a timeout
show ordinary exceptions in dcplot errors
Merge branch 'master' into fetch-rowset
artifacts
add avg().valueOf to not have to grab fields
first attempt at ordinal bar charts
infer ordinal x; rename transform to scale

trying to call the base of a scale a 'transform' was just confusing, so
just call it a scale.
here is code for guessing that the x scale is ordinal by looking
if it's a factor or if it has string values
also introduces the 'x.ordinal' attribute to be explicit
x.domain and y.domain are now only required if !elastic
fixes for read-only mode

properly tie cursor and cell read-only mode to model bit
mvc handling of read-only mode (properly separate concerns)
model bit is behind proper get/set method
latest dc.js

encorporating fixes on my fork
as well as dc.js pull 251 fixing ordinal bar charts with empty bars
Merge branch 'fetch-rowset'

Conflicts:
	htdocs/js/rcloud_bundle.min.js
	htdocs/lib/dependencies_bundle.min.js
merge new dc.js with some fixes

take ordinal coordinate grid chart x domain inference out
to replace with experimental feature building into dc.js based on computeOrderedGroups
artifact