[FEATURE] mason_variator: writing out an id for the simulated variants
[NOP] Small comment changes.
[FEATURE] mason_variator: write out variant info

An id can be assigned to the simulated variants and written out to VCF.
The id is also written to the breakpoints TSV file.
Merge pull request #38 from holtgrewe/feature/mason2_update

[FEATURE] mason_variator can now write out variant ids to VCF and breakpoints TSV file