Add initial .gitignore for LaTeX and ass1

.gitignore

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+# LaTeX stuff
+## Stolen from my bachelor internship.
+## Core latex/pdflatex auxiliary files:
+# From https://github.com/github/gitignore/blob/master/TeX.gitignore
+*.aux
+*.lof
+*.log
+*.lot
+*.fls
+*.out
+*.toc
+*.fmt
+*.fot
+*.cb
+*.cb2
+.*.lb
+*.fdb_latexmk
+
+## Intermediate documents:
+*.dvi
+*.xdv
+*-converted-to.*
+# these rules might exclude image files for figures etc.
+# *.ps
+# *.eps
+# *.pdf
+
+## Generated if empty string is given at "Please type another file name for output:"
+.pdf
+
+## Bibliography auxiliary files (bibtex/biblatex/biber):
+*.bbl
+*.bcf
+*.blg
+*-blx.aux
+*-blx.bib
+*.run.xml
+
+## Build tool auxiliary files:
+*.synctex.gz
+
+# ffuts XeTaL
+
+# Assignment 1
+sc_elements.pdf