Current version is 0.16

* Changes since version 0.15:
  - various bugfixes (thanks to Daniel Kobras mainly)
  - upgrade to gtk2.0 because gtk1.2 is dead upstream and no longer
    supported by most distributions. This also removes the dependency
    on the imlib library.
  - due to not using imlib anymore, image saving currently only supports
    png images

* Changes since version 0.14:
  - added ability to scale functions
  - key bindings for animation control, etc.
  - added log axes
  - added zoom history
  - right-clicking shows the coordinate location of the pointer
  - time integrating functions
  - some legend rendering bugs fixed
  - some memory leaks fixed
  - removed broken convergence testing function
  - debianisation
  - include support for reading '-' (stdin)
  - include support for reading from pipes
  - font size command line option

* Changes since version 0.13:
  - fixed a keybinding in the plot window
  - fixed various overflows 
  - added some extra nan-checking
  - added support for reading gzipped files
  - added --skip command line option
  - added display of axis ranges on plot background, with '--no-range' option
  - added legend positioning options and '--legend' option

* Changes since Version 0.12:
  - added rudimentary support for exporting images
  - raise control panel using 'p' key
  - some fixes to convergence testing and command line arguments

* Changes since Version 0.11:

  - added some special plots: derivative, subtract A-B, convergence exponent
  - added ability to set axis ranges from the command line and plot window
  - cured various seg-faults
  - introduced various new seg-faults