[MacPorts] #34669: Update gwyddion to version 2.28

[MacPorts]

#34669: Update gwyddion to version 2.28
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 Reporter:  feranick@…            |       Owner:  macports-tickets@…                   
     Type:  update                |      Status:  new                                  
 Priority:  Normal                |   Milestone:                                       
Component:  ports                 |     Version:  2.1.1                                
 Keywords:                        |        Port:  gwyddion                             
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 Currently gwyddion is in version 2.26 in macports. version 2.27 was staged
 in a separate bug report, but it never made to the stable repository. Now
 version 2.28 (with some important support for additional file formats) is
 available upstream and it would be great to have it on macports.

 Changelog:
     Nanoscantech (new): Imports NanoScanTech .nstdat files.
     TIA SER (new): Imports FEI Tecnai imaging and analysis .ser files.
     DM3 (new): Imports Digital Micrograph DM3 TEM images (only greyscale
 data at present).
     PID (new): Simple simulation of PID loop effects during scanning.
     Lateral force (new): Simulation of lateral force from topography
 channel.
     Neural network (new): Neural network data processing.
     XY denoise (new): Data denoising based on horizontal and vertical
 scans.
     WIP: Spectral transformation for Raman data was fixed and swapped XY
 axes in datafields were really fixed.
     Zeiss: Files without key-value pairs in tag 34118 are recognised and
 loaded.

 Other

     Compatibility with libpng 1.5 was corrected.
     GNOME 3 thumbnailer file is installed, making gwyddion-thumbnailer
 work automatically in GNOME 3.
     configure has an option --enable-home-installation to ease desktop
 integration if you compile from source code and install to your home.

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Ticket URL: <https://trac.macports.org/ticket/34669>
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