move libteam to "libteam" dir

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
rename dir "src" to "utils"

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
libteamdctl: add lib core

also add utils/teamdctlx.c which will eventually replace
teamd/teamdctl.c

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
libteamdctl: add clis skeletons

Signed-off-by: Jiri Pirko <jiri@resnulli.us>