When loading a dataURL all the existing variables should be cleared

[lpatiny]

Currently when changing of views and reloading data the existing variables are not cleared.

For example you can search for benzene by structure on:

http://visualizer.epfl.ch/cheminfo/visualizer_201403290653/index.html?config=..%2F_design%2Fflavor%2F_list%2Fconfig%2Falldocs%3Fkey%3D%22biooriented%22&dataURL=%2Fcheminfo%2F4b7669c5ec0a15e6fb3994f53b952eeb%2Fdata.json&viewURL=%2Fcheminfo%2F4b7669c5ec0a15e6fb3994f53b952eeb%2Fview.json

And then switch the view to IR -> Browse spectra. The data will still be there while there is a dataURL so we expect to reload all the data.

Moreover after changing of view if you make another query the result does not appear in the table. You need to reload the page so that it works.

[targos]

There may be an issue with the doView and doData callbacks (entrypoint.js):

• doView : calls "this" in the window context
• doData : never receives the "reloading" parameter
  It could also explain why Versioning.setViewJSON recreates the grid (Context menu duplication #62)