[TEST] Create a mini example for different SV types

[Irallia]

• Add a parameter, that we can specify a SV length, the default remains at 30bp.
• Created a small example for different types of SVs: Deletion, Insertion, Duplication, Translocation, Duplication in the Referece
• Create a VCF for the resulting junctions
• Test the sam with samtools and look at it via IGV
• Write a test case for the example file

A call should look something like this:

./bin/detect_breakends ~/Repos/iGenVar/test/data/mini_example.sam ~/.../mini_out.fasta > ~/.../mini_junctions.vcf -l 10