chore(version): Sets version to 2.7.1

chore(version): Switches to version 2.7.0

chore(changelog): Adds changelog for 2.6.2

chore(changelog): Adds changelog for 2.6.1

chore(changelog): Adds changelog for 2.6.0

Version 2.4.1 22th July 2022

- allow writing poses for robot links in the BopWriter
- fix a pip install bug
- fix a bug in the LinkUtility of the URDF loader

Version 2.4.0 20th July 2022

 add urdf support:
   this enables the simulation of robotic arms with forward and inverse kinematics
   add an example to show of how this works
 add a new face slicer option, making it easier to slice the top of a table away for placing objects on them
 add a new example for sampling objects in 3D Front scenes
 switch to vhacd version 4.X allowing for faster decompositions than before, speeding up the simulation
 add an option to link blend files instead of loading them (faster, but objects can not be changed after linking)
 add a new replica loader, loading semantic objects instead of just one mesh for the whole scene
 add basic support for apple silicion (M1, M2), this might still mean that some packages have to be installed on their own afterwards
 add return random material to the load haven material function, the function returns also now the full loaded list of materials
 add new function to create a material based soley on a texture (Path or bpy.types.Image)
 upgrade to blender 3.2.1
 reduce the memory demand of the semantic segmentation by fixing a small bug
 fix a bug where the coco annotation writer wouldn't work if the frame_start is not zero
 fix a bug where writing alpha images in the bop writer did not work
 fix a bug where pip would reinstall packages all the time
 fix a bug where on windows the pip path would be wrong