Wrap up tasks

[ruaridhg]

• Test_per_frame_materials (see Add integration tests #42 )
• Test_per_frame_geometry (see Add integration tests #42 )
• Fix geometry testing
• Remove randomise all button or get it working (not for UD panel)
• User defined panel with operators.py rand per frame
• User defined panels with input/output functionality Read randomisation boundaries from an input config file #16 and Export parameters of the randomisation #17
• Refactor code i.e. move frequently used functions into utils and Refactor frequently used functions into a utils folder #67
• Create issue for colour randomisation input_bounds.json and install_and_enable_addons.py (see Materials colour min-max can only be set to the same values #82 )
• Create issue for materials colour export (see Materials colour cannot export default value #83 )
• Remove print statements in code
• Remove unnecessary files for public release
• Documentation Documentation/Add-on release #71
• Add screenshots to docs
• Make repo public