Merge pull request #596 from cmu-delphi/readme-figs

replace readme fig with svg, remove old stragglers

Author: dshemetov

README.Rmd

@@ -119,7 +119,7 @@ edf
 
 Autoplot the confirmed daily cases for each `geo_value`
 
-```{r}
+```{r, dev='svg'}
 edf %>%
   autoplot(smoothed_cases_daily)
 ```

README.md

@@ -161,4 +161,4 @@ edf %>%
   autoplot(smoothed_cases_daily)
 ```
 
-<img src="man/figures/README-unnamed-chunk-7-1.png" width="90%" style="display: block; margin: auto;" />
+<img src="man/figures/README-unnamed-chunk-7-1.svg" width="90%" style="display: block; margin: auto;" />