Add NHDPlus Catchments to DB setup script
Add NHDPlus Catchments to DB setup script

  We received a dump of the NHDPlus catchment data
  from stroud. We'll be using it to display catchment
  boundaries and their intersecting streams
  in mapshed subbasin-mode.

  The dump did not include a step to create the
  table, so I created the table on my instance,
  then created a new dump with it.

  There are `2,647,454` rows. The `comid` column
  relates to `nhdflowlines`, though there are no
  catchments for flowlines of certain `fcodes`,
  for example `ArtificialPath`s, `CanalDitch`s, etc,
  (entries [here](https://nhd.usgs.gov/userGuide/Robohelpfiles/NHD_User_Guide/Feature_Catalog/Hydrography_Dataset/Complete_FCode_List.htm) that are described as having "no
  attributes")

```
vagrant ssh services
// add db credentials so you don't need to
// be prompted for the password
vim ~/.pgpass

// on local machine
vagrant ssh services -c 'pg_dump -c --if-exists -O \
        -t nhdplus \
        -h localhost -U mmw -w mmw' \
  > nhdpluscatchment.sql
gzip nhdpluscatchment.sql
```

Refs #2522

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