get_meta_metadata()

[aappling-usgs]

currently just a placeholder function in powstreams. needs implementation here and import in powstreams.

[aappling-usgs]

will need to describe all datasets in list_metas(), soon to include water quality information and currently these:

> list_metas()
 [1] "basic"      "climate"    "dvqcoefs"   "hydrol"     "indy"       "landcover"  "manual"     "metabinput"
 [9] "soil"       "styx" 

get metametadata information from:

• climate, hydrol, landcover, and soil: ted's cheatsheet
• basic from alison & NWIS
• indy and styx (different site types) from alison
• manual from alison and (our google spreadsheet)[https://docs.google.com/spreadsheets/d/1yAzDrdaztX0vh1ifpYiMurOQDPDrfqysUGdpC1HzHEA/edit?usp=sharing)
• dvqcoefs from alison and 7/20/15 email from jud harvey titled, "Rating curve coefficients for Powell Center Metabolism sites"
• metabinput from alison
• water quality information: dataRetrieval, NWIS, WQP

[aappling-usgs]

implementation will include functions to stage and post such meta metadata, plus the execution of those functions.

[aappling-usgs]

whoops, did it again - water quality information should NOT be included here, because it's going to take timeseries form rather than site summary form.