[FEATURE] Call Tandem Duplications

[Irallia]

To become as good as SVim, we need to detect (Tandem) duplications. We have to extract them from the insertions by looking at their sequences.

1. Part: A characteristic of tandem duplications is the number of copies. We want to store this in the new variable int16_t tandem_dup_count. It is 0 if there is no duplication (e.g. insertion (novel element), deletion, inversion ...).
2. Part: The VCF file includes some ALT lines, which are still missing.
3. Part: Call tandem duplications via CIGAR string
4. Part: Call tandem duplications via SA tag