rv in home dir should also source ~/rv

[dpastoor]

currently, when using rv globally will get from an init'd project:

Error in file(filename, "r", encoding = encoding) :
  cannot open the connection
In addition: Warning message:
In file(filename, "r", encoding = encoding) :
  cannot open file 'rv/scripts/rvr.R': No such file or directory

we need to update the addition to the users .Rprofile to be

source("~/rv/scripts/rvr.R")
source("~/rv/scripts/activate.R")

instead