Use boost::shared_ptr and stl tools to implement a SwPosFlyFrms which can be
used and handed over by value and cleans up it's content to avoid memory leaks.

Found by: Chao Huang
Patch by: Chao Huang, alg
Review by: Chao Huang, alg

(cherry picked from commit c26f80aa)

Conflicts:
	sw/inc/doc.hxx
	sw/inc/flypos.hxx
	sw/source/core/doc/doclay.cxx
	sw/source/core/layout/flypos.cxx
	sw/source/core/unocore/unoobj2.cxx
	sw/source/filter/html/htmlfly.cxx
	sw/source/filter/ww8/writerhelper.cxx

Change-Id: If610457654b1056d799d4336cd249815f7878a96

Fix build breaker from i120106

Patch by: Chao Huang
Suggested by: alg

(cherry picked from commit 880aadbe)

Conflicts:
	sw/source/filter/ww8/writerhelper.cxx

Change-Id: I516fcb6ee69944c54cc9eb76c069eb8b28749050