Merge pull request #4 from okuligowski/dev

Upmerge
Little api change
No hardcoded separators.
Merge branch 'dev' of https://github.com/tpasternak/ProjektEKG into dev
Merge pull request #37 from tpasternak/dev

No unsafe lazy eval + fixed hardcoded dir separators.
Merge branch 'dev' of https://github.com/okuligowski/ProjektEKG into dev