Merge pull request #225 from zultron/master

Remove machinekit-xenomai pkg kernel Depends:
components : change IO pins of pid to IN

it was not possible to connect an IO pin to another writing pin
for example "net signal mux2.0.out pid.0.bias"

changed were:
Pgain
Igain
Dgain
FF0
FF2
deadband
maxerror
maxerrori
maxerrorD
maxcmdD
maxcmdDD
bias
maxoutput
docs : update manpage pid.9 for use of IN pins
Merge pull request #226 from luminize/input-pins-for-pid

components : change IO pins of pid to IN
hal/utils: reorder libs for linking halcmd

makes the Ubuntu linker more comfortable
Turn on blending by default
Fix for F-word limit in position sync
emc/tp/tp.c: fold a long line
Merge pull request #228 from mhaberler/feed-fix

trajectory planner: fix  F-word limit in position sync, enable blending by default
Fix x86_64 RTAI math CFLAGS

- rtai-config --arch output changes with v4.0
  - instead use $host_cpu from AC_CANONICAL_HOST

- add -mpreferred-stack-boundary=4 to enable SSE instructions in
  kmodules
  - http://mail.rtai.org/pipermail/rtai/2013-December/026198.html