rtorrent: compile with xmlrpc-c for 3rd party UIs
Merge pull request #3597 from Fuuzetsu/rtorrent-xmlrpc

rtorrent: compile with xmlrpc-c for 3rd party UIs
weechat: Bump to 1.0.

A happy day for all weechat-users!
update cran packages
manually fix dplyr and png cran-packages