Diktat errors.

[includealex]

A new tool had been added to this project. Running

mvn diktat:check@diktat

will throw an amount of errors.
For running a single program, some binaries should be downloaded:

curl -sSLO https://github.com/pinterest/ktlint/releases/download/0.46.1/ktlint && chmod a+x ktlint
curl -sSLO https://github.com/saveourtool/diKTat/releases/download/v1.2.3/diktat-1.2.3.jar

and then

./ktlint -R diktat-1.2.3.jar --disabled_rules=standard "path/to/your/file"

For instance,

./ktlint -R diktat-1.2.3.jar --disabled_rules=standard "src/main/kotlin/org/polystat/j2eo/translator/Declarations.kt"

We need to add diktat checker to CI, so all conflicts should be resolved.