* R/mix.R(rendersmiles2): Fix colour.

* DESCRIPTION: New imports.
  [curl]

* R/mix.R(rendersmiles2,renderurl): New functions.
  Various function that are a rip-off of Emma's RChemMass and deal
  with the plotting of structures using an online resource.

* man: Update docs.

* README.org: New file.

* README.org: New file.

* R/mix.R(presc.plot): New argument.
  [pal] Colorbrewer palette.

* R/mix.R(presc.plot): New function. Plots the prescreening data.