Merge pull request #24 from shimokawa-naoki/topic_index_UI

Add header
Amend login UI, header
Merge pull request #25 from shimokawa-naoki/topic_bootstrap_index_UI

Amend login UI, header
Add login authentication as before_filter
Merge pull request #28 from shimokawa-naoki/topic_unregistered_user

Add login authentication as before_filter
Add footer
Merge pull request #29 from shimokawa-naoki/topic_footer

Add footer
Amend icon

Amend top-page color
Merge pull request #30 from shimokawa-naoki/topic_index_icon

Amend icon
Display ticket number

Amend to get current_user before filter
Amend header
Amend Giron button
Refactor DB schema

Bugfix authenticate loop
Amend to decrease ticket_num when creating rounds
Add user debating lists
Amend round-list button

Add top page link
Add logout, profile button to the header.
Merge pull request #37 from shimokawa-naoki/topic_index_page_UI

Topic index page UI
Amend giron lists

Amend button position

Amend lists contents to show user name
Merge pull request #40 from shimokawa-naoki/topic_index_page_UI

Amend giron lists