Internationalize actions_ajax.html.
Translate some messages.
Translate more.
Translate some messages.
Fix a problem that calls a wrong function name.
Fix a problem in which 'else' is mistakenly missing.
Redefine the trigger severity levels in order to handle all the ZABBIX severity levels.
Add a new tool: hatohol-def-src-file-generator.

This tool generates a source file including constants
such as TRIGGER_SEVERITY_INFO.

Currently it can generate a source file for JavaScript only.
Generate client/static/js/hatohol_def.js automatically.
Translate words concerned with severity.
 Translate words concerned with status.
Merge branch 'issue24-5'