Replace constant instead of redefining it so that we don't get an ugly warning. Thanks @skade https://github.com/padrino/padrino-framework/pull/1181#issuecomment-15458360.
Using %[] as @DAddYE suggested.
update Twitter bootstrap
Merge pull request #1191 from WaYdotNET/update-bootstrap

update Twitter bootstrap
Merge pull request #1187 from padrino/comply-to-sinatra-supported-http-verbs

Fix warning message on VALID_HTTP_VERBS
simple_format should be marked as html_safe (Closes #1194)
[helpers] Escape text before simple_format
Fix "bootstrap.min" path of production environment
Merge pull request #1197 from tyabe/fix_js_path

Fix "bootstrap.min" path of production environment