could not load: libhts.so
Hi Brent,

I installed mosdepth using bioconda but then I get the error:

```
mosdepth -h
could not load: libhts.so
compile with -d:nimDebugDlOpen for more information
```

When I installed, conda also installed htslib. I went looking for the libhts.so file:

```

ls /home/indapa/anaconda2/lib/ | grep hts
libhts.a
libhts.so
libhts.so.1.7
libhts.so.2

```
And then tried the following but the same error:

```

LD_LIBRARY_PATH=/home/indapa/anaconda2/lib mosdepth -h
could not load: libhts.so
compile with -d:nimDebugDlOpen for more information

```

I'm not sure what the best way forward is. I really want to use your tool so if you can help
point in the right direction, that would be great. 
