Update setupdb.sh to load nhdflowline with slope
Update setupdb.sh to load nhdflowline with slope

* We've added a slope column to nhdflowline: `slope`
* We're displaying it in the streams analyze table
* Updated migration has been added to s3

Creation steps:

* (mmcfarland already had the NHD attributes
   on his passport. They were copied from there,
   though region 18 (CA) had to be downloaded
   from NHD again. It wasn't unzipping correctly)
```
tar -zxvf raw-nhd.tar
for a in *.7z; do 7za x "$a"; done
```
Should end up with a set of directories,
one for each region. Pull the slope attr
from each and put it in an aggregate .dbf

```
find . -name 'elevslope.dbf' -exec ogr2ogr -update -append
./totals.dbf {} -sql "SELECT comid, slope from elevslope" \;
```

Put slope table in DB and join it to nhdflowline
```
vagrant ssh services
sudo apt-get gdal-bin
ogr2ogr -update -append -f "PostgreSQL" PG:"host=localhost user=mmw
dbname=mmw password=***" -nln elevslope totals.dbf

psql -h localhost -U mmw mmw
```

```
SELECT f.*, es.slope INTO nhdflowline_with_slope
FROM nhdflowline f LEFT JOIN elevslope es ON f.comid = es.comid;

drop table nhdflowline;

alter table nhdflowline_with_slope rename to nhdflowline;
```

- Dump nhdflowline, gzip, upload to s3

WikiWatershed/model-my-watershed,WikiWatershed/model-my-watershed,WikiWatershed/model-my-watershed,WikiWatershed/model-my-watershed,WikiWatershed/model-my-watershed