Merge branch 'release/0.4' into develop
supported markup languages.
use default theme
optimize js code to create sharing urls.
refs #16: fix license problem.
Merge pull request #17 from gkmngrgn/feature/github-16

refs #16: fix license problem.
fix my email address.
redirect to LICENSE for more information.
less files.
bootstrap integration.
style updates.
style update.
sidebar style updates.
sidebar is OK.
update styles.
refs #16: update archive list view.
fix header problems.
Merge pull request #18 from gkmngrgn/feature/github-16.1

Feature/github 16.1
zen mode integration. refs #16
update document about less files.