Added usage document.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Appended lintian switching option.

  * The lintian checking is enabled in default.
  * Work around failed unit tests fails in travis-ci,
    why the sample package has some violation of lintian as follows;
     - There are some differences with between Ubuntu Precise
       and Debian GNU/Linux Sid.
     - It is the dummy package not packaged in main.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>