m4_rev update (#46)

* M4 rev (#44)

* Added etrainee_m4_utils

* import of our modules changed to etrainee_m4_utils

* Fixed missing fig 3

* Added links to citations + added our isprs annals paper from 2022

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Co-authored-by: jdvorak <jakub.dvorak@natur.cuni.cz>

* M4 rev - theme 2 update (#45)

* edits

* edits

* edits

* edits

* edits

* typos and equation fixes

* typos and equation fixes

* language and grammar check

* replace temporary intro file with full version

* minor fixes

* delete temp file

* minor fixes

* minor fixes

* image size adjusted

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Co-authored-by: jdvorak <jakub.dvorak@natur.cuni.cz>
Co-authored-by: Jakub Dvorak <jacobdvorakcz@gmail.com>

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Co-authored-by: Jakub Dvorak <jacobdvorakcz@gmail.com>
Co-authored-by: jdvorak <jakub.dvorak@natur.cuni.cz>