Makefile: remove whitespaces

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
header: change function prototype

Use better name function:

zio_<subgroup>_<action>

e.g.
zio_zattr_read
zio_ctrl_read

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
libsysfs: allow to ask directly to read a path

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
ZIO_CONTROL_SIZE remane according to zio

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
header: introduce zio hierachy

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
libsysfs: various bugfixes

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
libsysfs: style fixes and comments

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
libsysfs: minor optimizations

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
hierarchy: parse hierarchy sysfs file

Signed-off-by: Federico Vaga <federico.vaga@gern.ch>
remove libsysfs

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
license: fix license header

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
style: remove white spaces

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>