Added unit test for feed_parser.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Moved docs/README.rst to /.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Added unit test for validators.

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

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Bumb version to 0.3.3.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Merge pull request #27 from mkouhei/devel

release 0.3.3