Resolves: #i123986# fix charmap accessibility for...

code points beyond the unicode baseplane

(cherry picked from commit 5a81299b05da6f1f9ec81246abe54c55f49793a4)

Conflicts:
	svx/source/accessibility/charmapacc.cxx

Change-Id: I29eaf14211be633a8dd354aac9f308e4a18ba27b
bump boost from 1.54 to 1.55

Change-Id: I5c9d01fa1be54b81f2aedead5f55ae737fb25d5a
reduce warnings patches

Change-Id: I7a861758236bbae7f82292123ff012de97e2f4de