Modify store#save_backup to store in specific path

This way it can accept arbitrary file types and store them
with appropriate locations and file extensions.

The previous implementation would always use the .dump extension
and the date as the path, making it impossible for it to store
more than one copy per day.
Add support for processing Chinese, Japanese and Korean documents.
Fix some deployment tasks.
Remove duplicate UKR email templates
Add ".text" extension to ensure rendered as text

Fixes #132
Merge pull request #11 from documentcloud/master

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