Add https://github.com/dinther/pathbuilder lib

LICENSE.md

@@ -44,6 +44,7 @@ The WASM build was made possible by https://github.com/DSchroer/openscad-wasm.
   + [YAPP_Box](#yapp-box)
   + [Stemfie_OpenSCAD](#stemfie-openscad)
   + [UB.scad](#ubscad)
+  + [pathbuilder](#pathbuilder)
 
 ## Manifold
 
@@ -737,6 +738,34 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ```
 
+## pathbuilder
+
+https://github.com/dinther/pathbuilder
+
+```
+MIT License
+
+Copyright (c) 2021 Paul van Dinther
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+```
+
 ## Common licenses
 
 These are linked from a few of the packages listed above.