updated gitignore

.gitignore

docs/source/HowToRun.rst

docs/source/LoadCase.rst

docs/source/Parts.rst

docs/source/Project_idea.rst

docs/source/SpindleAssembly.rst

docs/source/SpindleMesh.rst

docs/source/conf.py

docs/source/images/GUIstp-1.pdf_tex

docs/source/images/GUIstp-1.png

docs/source/images/GUIstp1.pdf

docs/source/images/GUIstp2.pdf

docs/source/images/GUIstp3.pdf

docs/source/images/GUIstp3.pdf_tex

docs/source/images/GUIstp3.png

docs/source/images/GUIstp4.png

docs/source/images/MT_structure.pdf

docs/source/images/MTangle.pdf

docs/source/images/Spindle_Image.svg

docs/source/images/Spindle_mode.svg