Change supported latex version, and encoding of template.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Ignored warnings from files under standard library.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Fixed violation pychecker and pylint.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Bump version to 0.4.0.

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