QtDen Files

Requires the libesom library for self-organizing maps.

Implementation notes:
- Main entry point is qtden.cc, param_window.cc handles the configuration screen
  and controls the analysis using a MetabAnalysis object in ParamWindow::run().
  The MetabAnalysis class filters the data and runs the SOM.
  The Dataset class handles tabular datasets, the MetabData class contains
  higher-level, program specific functions such as statistic tests and handling
  of replicates and samples.