fixes #11 support Python 3.2, 3.3

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
travis for python 3.2, 3.3

 * append pytest, and updte swiftsc version of requirements

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
support python2, python3 of debian package

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Merge branch 'devel'