Add very simple main page to include/libcgroup.h. It contains just very
basic info and links to the other modules. Feel free to elaborate more on
this, it could contain lot more:
 - how to complie with libcgroup (=pkgconfig)?
 - how to report errors
 - links to samples
 - link to home page
 - info about threading
 etc.

Signed-off-by: Jan Safranek <jsafrane@redhat.com>

Signed-off-by: Jan Safranek <jsafrane@redhat.com>

Signed-off-by: Jan Safranek <jsafrane@redhat.com>

Signed-off-by: Jan Safranek <jsafrane@redhat.com>

Signed-off-by: Jan Safranek <jsafrane@redhat.com>

Signed-off-by: Jan Safranek <jsafrane@redhat.com>

Signed-off-by: Jan Safranek <jsafrane@redhat.com>

Signed-off-by: Lennart Poettering <lennart@poettering.net>
Acked-by: Dhaval Giani <dhaval.giani@gmail.com>
Signed-off-by: Dhaval Giani <dhaval.giani@gmail.com>

This patch adds the const qualifier to a number of function arguments
(mostly string arguments) so that client libraries can pass their own
const strings to the library without having to cast their const'ness
away.

This also drops a couple of consts where call-by-value is done anyway,
and which hence has no effect and just misleads the users and adds
unnecessary noise to the signal. After all this is C, not C++.

Signed-off-by: Lennart Poettering <lennart@poettering.net>
Acked-by: Dhaval Giani <dhaval.giani@gmail.com>
Signed-off-by: Dhaval Giani <dhaval.giani@gmail.com>

Later on it might make sense to move around function definitions between
header files. Hence make sure that nobody includes any header file
directly except the main one.

Signed-off-by: Lennart Poettering <lennart@poettering.net>
Reviewed-By: Jan Safranek <jsafrane@redhat.com>
Acked-by: Dhaval Giani <dhaval.giani@gmail.com>
Signed-off-by: Dhaval Giani <dhaval.giani@gmail.com>