Update documents and dependency for feed development.

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

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Fixed un-displayed categories.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Fixed un-displayed tags.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Fixed link of categories, tags.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Fixed bookmark view and feed.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Release 0.2.0

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