Move library(ggrough) to first chunk in README

[batpigandme]

Moved the call to attach ggrough to the first code chunk, since you need it for the pipe. This avoids throwing:

#> Error in count(mtcars, carb) %>% ggplot(aes(carb, n)) : 
#>  could not find function "%>%"

Love this package! 💖

[xvrdm]

Thanks for flagging this. Actually, I am a bit unsure if it is good to have people using ggrough as the needed dependency for pipes. Do you think we should add a library call to {maggritr} (even if it is not really necessary) ?

[batpigandme]

I agree in terms of re-exporting the pipe. Magrittr or dplyr work! Feel free to close this and reimplement however you like, btw.