Update RTXI (RTXI#135)

* Feature/xenomai update (RTXI#134)

* Updated installation procedure for linux 4.9.90 and xenomai 3.1

* Removed unsupported backwards compatibility with git libraries

* Improved kernel installation script for more dynamic file downloads

* Changed kernel and ipipe to supported versions

* Updated missing dependency

* updated build process and added pkgconf dependency in installation scripts

* Added CIP kernel support

Co-authored-by: Ivan F. Valerio <[email protected]>

* Updated teamviewer installation script for helpdesk

Co-authored-by: Ivan F. Valerio <[email protected]>

xenomai does not include kernel patches in tarballs anymore; updating…

… install script, backward compatibiltiy NOT included

updating version; adding rtxi version to HDF file output

overhaul of formatting/etc prior to commenting base

solved bug related to listing analog channels when using NI boards wi…

…thout AO

updating deps

Merge branch 'master' into qt4

removed printfs

started versioning about code; this is rc-1

update to xenomai 2.6.4