CRM-14367 add group by and send by email options to pdf letter task from
contribution search
CRM-14367, preliminary tidy up + re-enable options

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* CRM-14367: Add ability to group contribution letters by contact (& possibly recurring contribution)
  http://issues.civicrm.org/jira/browse/CRM-14367

CRM-14367 - early return for no known token

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* CRM-14367: Add ability to group contribution letters by contact (& possibly recurring contribution)
  http://issues.civicrm.org/jira/browse/CRM-14367

fix static function, comment fixes

CRM-14367 add options to send thank you letter - grouping, separator, email as option

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* CRM-14367: Add ability to group contribution letters by contact (& possibly recurring contribution)
  http://issues.civicrm.org/jira/browse/CRM-14367

CRM-14367 - don't white screen when no pdfs

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* CRM-14367: Add ability to group contribution letters by contact (& possibly recurring contribution)
  http://issues.civicrm.org/jira/browse/CRM-14367

CRM-14367 - always apply aggregates

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* CRM-14367: Add ability to group contribution letters by contact (& possibly recurring contribution)
  http://issues.civicrm.org/jira/browse/CRM-14367

assign aggregrates for grouped & non-grouped as no real performance hit & more predictable

send mails as pdf instead

CRM-14367 - add pdf options

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* CRM-14367: Add ability to group contribution letters by contact (& possibly recurring contribution)
  http://issues.civicrm.org/jira/browse/CRM-14367

Conflicts:
	CRM/Contribute/Form/Task/PDFLetter.php
	CRM/Contribute/Form/Task/PDFLetterCommon.php
	CRM/Utils/Token.php
	templates/CRM/Contribute/Form/Task/PDFLetter.tpl