Update Unicode data up to v7.0

* Two newly adopted currency symbols:
  the Azerbaijan manat and the Russia ruble
* Pictographic symbols (including many emoji), geometric symbols,
  arrows, and ornaments originating from the Wingdings and Webdings sets
* Twenty-three new lesser-used and historic scripts
  extending support for written languages of North America, China, India,
  other Asian countries, and Africa
* Letters used in Teuthonista and other transcriptional systems,
  and a new notational set, Duployan

For more details, see http://www.unicode.org/versions/Unicode7.0.0/



The Properties struct's .*Diff members were narrowed down
to signed 15 bits and the unicodeVersion has been expanded to 8 bits.

[ChangeLog][QtCore] Unicode data updated to v.7.0

Change-Id: I93ab6f79fa3b05f61abc7279f1d046834c1c1a0b
Reviewed-by: Lars Knoll <lars.knoll@digia.com>