Send email when translations are requested

Add an option to send an email to a configured email address whenever a translation job is created. The purpose is to let translators know which documents have been requested in which language.

Configuration

Add an option to the translator configuration in tmgmt_zanata (in pluginSettingsForm(), found in tmgmt_zanata.ui.inc) with:

1. checkbox: 'Send an email when a job is created' (default false)

2. email/textfield: 'Email address to send to when a job is created' (default empty)

When to send

If the the 'Send email...' configuration option is TRUE, send an email when translations are sent to the server. This may belong in requestTranslation() found in tmgmt_zanata.connector.inc.

Email content

The email title should include the locale and document names (if there are not too many). The job title may be a sufficient placeholder for the document names.

The email body should have the full locale name and locale code, and the full list of documents.

If possible, each document in the full list would include

1. document title

2. document name in Zanata (e.g. node/123)

3. a link to edit in Zanata (see getEditorUrl() for a start, then add another query string parameter for the selected document)

4. a link to the document on Drupal