Sed commands in data_fabfile.py

The following sed command does not execute in a regular bash shell:

```
$ sed -rie .bak '/1/ s/^>.*$/>foo/g' foo.fasta
sed: -e expression #1, char 1: unknown command: `.'
```

On the other hand, the Fabric counterpart works without any issues, as opposed to what's stated in the comment:

```
# sed in Fabric does not cd properly?
```