Cleanings for TDD
finish 03-refactoring lecture
add 07-solid lecture
Merge pull request #24 from AoD314/refactoring

finish 03-refactoring lecture
Merge pull request #25 from AoD314/solid

add 07-solid lecture
Merge pull request #22 from UNN-VMK-Software/clean-tdd

Cleanings for TDD
Add line numbers when reporting trailing whitespaces
More logging while generating slides
Merge pull request #29 from UNN-VMK-Software/update-travis-config

Update travis config
finish 02-clean-code lecture