SSP-2427 Embed PDF fonts to render certain HTML font styles

Fixes bold and italics rendering in HTML text fields in Jasper
PDF reports.

Based on a solution proposed here:

  http://stackoverflow.com/a/24054577
SSP-2427 updates for email formatting through message templates
SSP-2427 Tweak EA/Email journal entry formatting

A number of minor changes to previous work in SSP-2427:

  - Try to get slightly better formatting in the Journal
    comment RTE, which converts line breaks to <br>'s silently
  - Expand MessageTO and replace EmailRequestTO with a Map.
    See comments in
    PersonEmailServiceImpl.buildJournalEntryCommentFromEmail()
  - Try to ensure in-app email is generated with <html><body>
    markup, but resulting Journal Entry comments remain
    document fragments