Reworked Settings home page, NPSP Resource page, start of Health Check

- Health Check is not done.  ~1/3 of tests are implemented.  ui is very crude.
- NPSP Settings and NPSP Resources pages are implemented to mostly match mockups.  Most links are still empty.

So none of this work is complete, but I wanted to get it into Dev so others could see it, and we wouldn't make a release without them (even if they are incomplete).