Implemented Konrad's suggestions, minor edits here and there

Today Konrad made the following suggestions after reading through the paper
(created from Commit 1ac5c12). Thanks a lot Konrad ;-). I tried to address
them all in this commit. Afterwards, while looking over the corrected
parts, some minor edits came up to me to remove redundant parts and add
extra points where it helps.

In particular to be able to print the International Phonetic Alphabet
(IPA), I had to include the LaTeX `TIPA' package, but it was interesting to
see that it was already available in the project as a dependency of another
package we loaded.

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