added comments to imported packages

documents/GeoTopo/GeoTopo.tex

@@ -1,6 +1,6 @@
 \documentclass[a4paper,oneside,DIV15,BCOR12mm]{scrbook}
 \usepackage{etoolbox}
-\usepackage{amsmath,amssymb}
+\usepackage{amsmath,amssymb}% math symbols / fonts
 \usepackage[utf8]{inputenc} % this is needed for umlauts
 \usepackage[ngerman]{babel} % this is needed for umlauts
 \usepackage[T1]{fontenc}    % this is needed for correct output of umlauts in pdf
@@ -15,19 +15,19 @@
 %\usepackage{enumerate}
 \usepackage{enumitem}
 \usepackage{tabto}
-\usepackage{braket} % needed for \Set
-\usepackage{csquotes}
-\usepackage{subfigure}
-\usepackage{parskip}
+\usepackage{braket}         % needed for \Set
+\usepackage{csquotes}       % \enquote{}
+\usepackage{subfigure}      % multiple figures in one
+\usepackage{parskip}        % nicer paragraphs
 \usepackage{pst-solides3d}
 \usepackage[colorinlistoftodos]{todonotes}
 \usepackage{pgfplots}
 \pgfplotsset{compat=1.7}
 \usepackage[arrow, matrix, curve]{xy}
-\usepackage{caption} % get newlines within captions
-\usepackage{tikz}
-\usepackage{tikz-3dplot}
-\usepackage{tkz-fct}
+\usepackage{caption}        % get newlines within captions
+\usepackage{tikz}           % draw
+\usepackage{tikz-3dplot}    % draw
+\usepackage{tkz-fct}        % draw
 \usetikzlibrary{3d,calc,intersections,er,arrows,positioning,shapes.misc,patterns,fadings,decorations.pathreplacing}
 \usepackage{cleveref} % has to be after hyperref, ntheorem, amsthm
 \usepackage{shortcuts}