Cleaned up repo a litte, more docu in README

.gitlab-ci.yml

Cargo.lock

Cargo.toml

README.md

src/bin/rusty-hektor.rs

src/lib.rs

src/post_process/mod.rs

src/post_process/test_runner.rs

src/transform/students.rs

tests/test_cli.rs

tests/test_xml_parser.rs