skyped: missing newline in log
test skype_set_away()
skype: avoid fake MBERS buddy in groupchats
test skype_chat_msg()
test skype_chat_topic()
test skype_group_by_name()
skype: ignore empty username (#1045)
skype: clean up installing section of README

These were the installation instructions for the out-of-tree plugin, no
longer relevant. Nowadays only the package names or the configure option
is interesting.
skype: fix build
Merge from vmiklos.