This is a first proof reading of the currently existing documentation.
fixes (hopefully all):
* spelling
* grammar
Tries to increase readabilty and ease of understanding by simplifying
and restructing some sentences and paragraphs. Filler words which add
to the cognitive load but don't add anything are removed
(most notably `also`).
Stoiko Ivanov
Aaron Lauterer
Dietmar Maurer
Christian Ebner