[#359,view/flot][m]: much better time series support by using flot time plugin - fixes #359.

* Note you still need to set the type of the field to time for this to work properly (i.e. we do not attempt to guess a column is dates as that is very error-prone).
[view/flot][xs]: cast dates to strings before attempting to parse.
[build][s]: regular build.
[view/multiview][s]: do not call fetch on dataset model in MultiView initialize (should be done in code using the view if needed).

* fetch method should have been done elsewhere (by client of the view)
* calling in the view is both wasteful and causes possible bugs as it may lead to race conditions to a fetch called by client code
[build][xs]: build.
[model,bugfix][s]: if explicitly passed field info to a dataset use that over any field info derived from backend.
[build][xs]: .
Merge remote-tracking branch 'upstream/master'
rebuild