Merge pull request #10 from ipa-jsf/electric_dev

Electric dev
Merge pull request #12 from ipa-jsf/electric_dev

Added pdfs for single tag files Electric dev
Merge pull request #13 from ipa-jsf/electric_dev

Electric dev
Merge pull request #14 from ipa-jsf/electric_dev

improved stability of marker
JSF: Added implementation of ArUco marker