Add Treasury Inspector General for Tax Administration
Fix agency name.
First working version.
Add some comments.
Initial version working.
[usps] Addresses loop as described in #94.

This works now, but refraining from adding to safe.yml until the USPS
OIG has had a chance to address their URLs.
Adding some review instructions.

For anyone merging scrapers, or updating safe.yml.

/cc @spulec @LindsayYoung
Per #90, no need for this line anymore.
sadly, no https (it redirects)
make pending section, add tigta
Merge pull request #95 from unitedstates/tigta

Add Treasury Inspector General for Tax Administration
clarifying readme, with pending section for safe.yml
Per #90, don't need unicode line.
Merge pull request #98 from unitedstates/nasa

Add NASA
[nasa] add to pending safe.yml
Per #90, don't need unicode line.
Merge pull request #96 from unitedstates/nrc

Add NRC
[nrc] add to pending safe.yml
Small cleanup of NRC re @audiodude 's comments.
Cleanup TIGTA per audiodude 's comments.