Rer.ufficiostampa

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- Index also text from contents.
[cekk]

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- Read value of slave form fields from the querystring.
[cekk]

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- Fix field logic.
[cekk]
- Set proper value in legislature field.
[cekk]

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- Fix README indentation.
[cekk]

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- Handle master/select logic for Legislature and Arguments in search form.
[cekk]

- Additional validations for subscribers import, also new behavior if invalid email/channels passed
[foxtrot-dfm1]

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- Pass query to export-csv endpoint to export only selected subscribers.
[cekk]