Create README.md

README.md

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+# gsview-overlay
+ Overlay for the gsview and some other plotting/scientific soft.
+
+Gsview is a very old ghostscript-based viewer for postscript and pdf files. 
+It's written on gtk1 and therefore was thrown out of the Gentoo repository along with gtk1.
+There are many modern PS/PDF viewers, but gsview has a number of unique features that make it irreplaceable
+when writing your own postscript code.
+1) Presence of a ruler for measuring coordinates.
+You can get the coordinates of any element of the picture in points, centimeters or inches.
+It is useful, for example, when you need to insert only a selected area of a large eps file in a latex document.
+2) Sequential rendering. You can see the drawing of the picture as the file is processed. Sometimes useful, always fun.
+3) Magnification of the picture fragment. There is no need to wait drawing the whole picture in high resolution,
+so the magnification can be made very large.
+
+For gsview we need gtk+-1.2 and glib-1.2. In order not to cry bloody tears, it's better to install gtk-engines,
+which depends on imlib.