Consistently use <lxc/lxccontainer.h> for the API

The API header was included in a variety of ways before, standardize
those to "include <lxc/lxccontainer.h>" as this will always work both in
tree and on a system with the headers installed.

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Add some missing comments to configure.ac

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
doc: Make everything use the @docdtd@ variable

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
doc: Fixed my first name

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>