Adds matio-1.5.2

matio is an C library for reading and writing Matlab MAT files.

Homepage: http://matio.sourceforge.net/
Adds getdata-0.8.5

The GetData Project is the reference implementation of the Dirfile
Standards, a filesystem-based, column-oriented database format for
time-ordered binary data. The Dirfile database format is designed to
provide a fast, simple format for storing and reading data.

Homepage: http://getdata.sourceforge.net/
Adds Kst-2.0.8

Kst is a real-time large-dataset viewing and plotting tool that has
built-in data analysis functionality.

Homepage: https://kst-plot.kde.org/
Merge pull request #5066 from vbgl/kst

Adds Kst