Implement repeat-expansion calling for long-reads

[marc-sturm]

Implement RE calling for long-reads

• [x] check for available tools (STRling, ...)
• [ ] benchmark tools by coparing to short-read GS
• [ ] validate postive controls

[leonschuetz]

• [x] implement straglr (most promising tool in Thomas validation without special mapping)
  • [x] write script to convert ExpansionHunter catalog
    • [ ] How to deal with complex repeats (call independent?)
    • [ ] Offtarget regions?
• [ ] test/validate

[leonschuetz]

• [ ] add -Y parameter for minimap2 to softclip supplement reads

[leonschuetz]

• [x] implement in GSvar
• [x] test Thomas' tool