Add dataset resources, and task description

[adelavega]

Addresses #343
Instead of repeating dataset description, added a hand annotation for task "summary"

[adelavega]

Hey @rwblair, could you update the frontend to show summary for Task "description". And add a small column on the right for each Dataset that is a link to the url property? Feel free to push to this PR.

[adelavega]

Also note that the database needs to manually updated to have those values (although upon fresh ingestion, they would be there). Once this is ready for testing on staging, I'll have to update the main db to add those values as well...

[rwblair]

The URL column is a bit cramped with all the other fields on the dataset table. Push with it in place so you can see it as is. Width is hard set and should probably be increased.

Another option might be to have the name of the dataset be a link to the URL.

[codecov-io]

Codecov Report

Merging #372 into master will increase coverage by 0.29%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #372      +/-   ##
==========================================
+ Coverage   84.95%   85.25%   +0.29%     
==========================================
  Files          37       37              
  Lines        1476     1519      +43     
==========================================
+ Hits         1254     1295      +41     
- Misses        222      224       +2

Impacted Files	Coverage Δ
neuroscout/populate/json.py	95.77% <ø> (ø)	⬆️
neuroscout/resources/task.py	100% <100%> (ø)	⬆️
neuroscout/populate/ingest.py	91.42% <100%> (+0.06%)	⬆️
neuroscout/models/dataset.py	95.45% <100%> (+0.21%)	⬆️
neuroscout/resources/dataset.py	100% <100%> (ø)	⬆️
neuroscout/models/task.py	93.75% <100%> (+0.41%)	⬆️
neuroscout/resources/run.py	100% <100%> (ø)	⬆️
neuroscout/populate/annotate.py	91.45% <0%> (+1.84%)	⬆️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov-io]

Codecov Report

Merging #372 into master will increase coverage by 0.29%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #372      +/-   ##
==========================================
+ Coverage   84.95%   85.25%   +0.29%     
==========================================
  Files          37       37              
  Lines        1476     1519      +43     
==========================================
+ Hits         1254     1295      +41     
- Misses        222      224       +2

Impacted Files	Coverage Δ
neuroscout/populate/json.py	95.77% <ø> (ø)	⬆️
neuroscout/resources/task.py	100% <100%> (ø)	⬆️
neuroscout/populate/ingest.py	91.42% <100%> (+0.06%)	⬆️
neuroscout/models/dataset.py	95.45% <100%> (+0.21%)	⬆️
neuroscout/resources/dataset.py	100% <100%> (ø)	⬆️
neuroscout/models/task.py	93.75% <100%> (+0.41%)	⬆️
neuroscout/resources/run.py	100% <100%> (ø)	⬆️
neuroscout/populate/annotate.py	91.45% <0%> (+1.84%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a4027a0...ea80614. Read the comment docs.