update INSTALL file
Doc: Generate *.po files for Japanese translations
Doc: Translate admin/index
Doc: Translate admin/getting-started
Doc: Translate reference/plugins/index
Doc: Translate reference/configuration/remap.config
Doc: Translate reference/configuration/index
Doc: Translate admin/reverse-proxy-http-redirects
Doc: Translate admin/security-options
Doc: Translate beginning of referenece/configuration/records.config
Doc: Translate admin/traffic-server-error-messages
Doc: Translate admin/http-proxy-caching
Doc: Translate reference/configuration/congestion.config
Doc: Translate arch/index.en.rst
Doc: Translate referenece/configuration/ssl_multicert.config
Doc: Translate System Variables section of records.config
Doc: Translate reference/api/index
Doc: Translate reference/api/TSTrafficServerVersionGet
Doc: Translate reference/api/TSDebug
Doc: Translate reverse proxy related sections of records.config