Add exercises for data structures

Context

Datastructures

Summary

• Create exercise as combination of the following
  • FS16-W4-PDF
  • FS16-W5-PDF
• Move Datastructures Solutions from ML-PDFs
  • Ueb05W04ML.docx
  • UebW05_Datenstrukturen_ML.pdf
• Add corresponding build job for Template archive and PDF
• Update link on repositories main page
• Update Dbs2 Wiki page