Add missing setters for pageSizeW and pageSizeH
Width/Height set/get tests
Update pageSizeW and pageSizeH docs

Conflicts:
	docs/containers.rst
Use page width and height default constants in tests
Update Changelog for setPageSizeW and setPageSizeH
Merge pull request #390 from spikex/develop

Add missing setters for pageSizeW and pageSizeH