* The way aspect ratio is specified was changed.
* Vertical extent is now set by -y instead of -v.
* Horizontal extent can now be expressed in terms of geographical
coordinates for swath plot types.
* Tick on trajectories can be specified by the newly introduced
trajticks and trajnminortics options.
* ccplot now checks libraries versions at start-up.
* -V print version flag was added.
* -v be verbose flag was added.
* The way plot layout is constructed was rewritten. Newly added
options plotheight, padding and cbspacing can be used to control
the layout.
* -z options parsing would cash the program instead of failing. Fixed.
* Default output filename now set to ccplot.png.
* List of available projections and options is not printed as part of
the help output, but can be printed by -p help and -z help (resp.)
* Insufficient memory error condition is now handled gracefully.
* Colormap files are now searched for in some default locations first.