Update README.md

Author: Beherith

README.md

@@ -1,38 +1,43 @@
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 # springrts_smf_compiler
 This tool allows the compilation and decompilation of image files to SpringRTS's binary SMF (Spring Map Format) map format. 
 
 https://springrts.com/
 
 To use the tool, place it in your /maps folder and launch pymapconv.py or start pymapconv.exe
 
-Miraculously self documenting, with one caveat: dont use absolute paths in MAP NAME.
+Miraculously self documenting.
 
 ![gooey](https://raw.githubusercontent.com/Beherith/springrts_smf_compiler/master/pymapconv_gui.png)
 
+## NEW FEATURES:
 
-#### 2019 UPDATE: Windows EXE available, pymapconv.exe works as long as nvdxt.exe is next to it :)
-
-The windows build is 64 bit, thus allowing the compilation of maps up 64x64 size!
-
-
-#### 2014 Outdated: Under Windows, you will need the following to make this work:
+### Version 3.1
+- Heightmaps same size as the diffuse texture are supported, and resized intelligently to get pixel-perfect heightmaps (solves the X to X/8 + 1 image interpolation problem)
+- Grass map is resized with nearest neighbour
+- Metal map is resized with bilinear filtering
+- More verbose and informative output
+- Works from anywhere (it is no longer required to copy into the maps working directory)
 
-Dowload the precompiled version from here 
-https://springrts.com/phpbb/viewtopic.php?f=56&t=34378&start=20
+##  Windows usage:
 
-OR
+Dowload and use the precompiled version in pymapconv.exe in this repository
+The windows build is 64 bit, thus allowing the compilation of maps up 64x64 size!
+Ensure that nvdxt.exe is next to it. 
 
+### Windows development:
 
 Python 2.7, 32bit -  https://www.python.org/downloads/
 
 PIL (Python Image Library) -http://www.pythonware.com/products/pil/ 
 
 PyQt4 - https://riverbankcomputing.com/software/pyqt/download (note: PyQt no longer provides Windows binaries, but you can obtain slightly old and suitable ones from https://sourceforge.net/projects/pyqt/files/PyQt4/PyQt-4.11.4/)
 
-#### Under Linux (e.g. Ubuntu 14.04 and up), it requires:
+## Linux (e.g. Ubuntu 14.04 and up), or for development it requires:
 Youre a big boy, go get the libs:
 Python 2.7
 Pillow (sudo pip install Pillow)
 PyQt4  (sudo apt-get install python-Qt4)
 ImageMagick (sudo apt-get install imagemagick)
 
+## by Beherith