Updated get_manta_sv doesn't work for remote users

This issue is caused by a new path for the manta merges. These new merges need to be synced by the accompanying snakefile in order to fix this. 

```
> all_svs = get_manta_sv()
[1] "missing:  /Users/rmorin/gambl_results/gambl/manta-2.3/merges/manta.genome--grch37.bedpe"
Error: '/Users/rmorin/gambl_results/gambl/manta-2.3/merges/manta.genome--grch37.bedpe' does not exist.
```