added a note about using 'prefix' to install Wrangler into a directory other than the default '/usr/local'.
added a note about using 'prefix' to install Wrangler into a directory other than the default '/usr/local'.


andrzejsliwa/wrangler,prowessproject/wrangler,arcusfelis/wrangler,arcusfelis/wrangler,bsmr-erlang/wrangler,tdb/wrangler