added readme, renamed files

README.md

+# Fourplay / HEX / ELEMENT Hanger
+
+
+## be aware that this is just a flimsy 3d Printed part and can't really be compared to the real deal made out of Aluminum.
+
+- released under the GNU General Public License (GPL) v3. A copy of the license is available in LICENSE.txt
+
+If you want me to print you a copy feel free to drop me a mail on inspired_hanger at berezowski de
+
+
+I have no clue which type of Aluminum alloy is used for hangers, but you'll get the idea here:
+
+https://www.makeitfrom.com/compare/3003-AlMn1Cu-3.0517-A93003-Aluminum/Polylactic-Acid-PLA-Polylactide
+
+The printed part will probably break as soon as you land on the chain tensioner.
+As soon as i have more experience with it i will update this readme.
+
+![washer](README/IMG_20180419_224613.jpg)
+
+
+### hanger.stl
+
+the current version i've installed on my fourplay. This file get's upated as soon as the hanger breaks
+
+you will need 3 washers
+
+* 1 x 20x1.8
+* 2 x 16x1.5
+
+
+### hanger.scad
+
+this is the parametrized source file
+if you wish to modify the 'default' version, you can easily do it via this file
+you'll need openscad to view your changes and export a mill/printable stl
+
+http://www.openscad.org
+
+the washers can be modified via those variables:
+
+    HUB_DIAMETER_SPACER
+    HUB_DIAMETER_SPACER_HEIGHT
+    HUB_DIAMETER_FRAME_SPACER
+    HUB_DIAMETER_FRAME_SPACER_HEIGHT
+
+
+if you improved this file somehow please send me a pull request to inspired_hanger at berezowski de
+
+Thanks !!
+
+## comparison
+![top](README/IMG_20180419_224425.jpg)
+
+![bottom](README/IMG_20180419_224442.jpg)
+
+
+## mounted 
+![mounted 90](README/IMG_20180419_232335.jpg)
+
+![mounted 45](README/IMG_20180419_232313.jpg)
+
+![mounted 0](README/IMG_20180419_232304.jpg) 
+
+
+

schaltauge.scad → hanger.scad

 include <libs/polyround.scad>
 include <libs/polyround.scad>
 include <libs/uploads_6f_12_f1_10_d2_ISOThread.scad>
 include <libs/uploads_6f_12_f1_10_d2_ISOThread.scad>
+// Author: Hubert Berezowski
+// Copyright: 2018
+// License: GPL 3
 
 
 TOLLERANCE = 0.15;
 TOLLERANCE = 0.15;
 T = TOLLERANCE;
 T = TOLLERANCE;