Release v0.13.0-beta.0

• style: fix (6d6a427)
• fix: Bugs (49c6dd2)
• Merge pull request #74 from ahomu/refactor/v0.13.0-beta1 (9514642)
• chore: Replace circle ci settings (f89b65e)
• docs: Update README.md (50be901)
• chore: Add release-it (1c9d8d5)
• fix: code styles (6d5fb58)
• chore: Add tslint (c87777d)
• docs: Update README.md & index.html (a231ef2)
• feat: Add wide option (b176c24)
• feat: Add presenter note feature (53fa5ce)
• refactor: Replace to v0.13.0-beta1 (aee9c94)
• Merge pull request #38 from ahomu/greenkeeper/postcss-cli-4.1.0 (694f88e)
• Merge branch 'master' into greenkeeper/postcss-cli-4.1.0 (f3aecb6)
• Merge pull request #33 from ahomu/greenkeeper/postcss-import-10.0.0 (f8eacb7)
• Merge pull request #39 from ahomu/greenkeeper/serve-5.2.2 (99eed87)
• Merge pull request #37 from ahomu/greenkeeper/postcss-6.0.1 (8d970cc)
• Merge pull request #36 from ahomu/greenkeeper/rxjs-5.4.1 (c66695b)
• fix(package): update rxjs to version 5.4.1 (c18efd7)
• chore(package): update postcss-cli to version 4.1.0 (cc80829)
• chore(package): update serve to version 5.2.2 (2341ea1)
• update index.html (07755c0)
• chore(package): update postcss-import to version 10.0.0 (59746dd)
• chore(package): update postcss to version 6.0.1 (f5d3875)