Update README, use david-dm to monitor dependencies.
Add Button spec and examples.

Signed-off-by: Lee <jessy1092@gmail.com>
Add docs.
- Divider, Flag, Header, Icon, Image docs.

Signed-off-by: Lee <jessy1092@gmail.com>
Fix Image elements bug.
- Use <img> instead of <div>

Signed-off-by: Lee <jessy1092@gmail.com>
Add type attribute in Label elements.
- Add docs: Input, Label.

Signed-off-by: Lee <jessy1092@gmail.com>
Add docs
- List, Loader, Rail, Reveal.

Signed-off-by: Lee <jessy1092@gmail.com>
Fix Segment bug: add color attribute.
- Add Docs: Segment.

Signed-off-by: Lee <jessy1092@gmail.com>
Add Docs: Steps/Step.

Signed-off-by: Lee <jessy1092@gmail.com>
v0.0.5
- Fix Segment bug: Add color attribute.
- Fix Image bug: Use <img> instead of <div>
- Add Elements Docs.