Update elements.rst

it's not perfect, but better than nothing.
Merge pull request #289 from chrissharkman/patch-1

Update elements.rst
Add missing setters for pageSizeW and pageSizeH
Fix page break sample code block
Merge pull request #385 from jaggyspaghetti/patch-1

Fix page break sample code block
Revert "Fix page break sample code block"
Merge pull request #386 from PHPOffice/revert-385-patch-1

Revert "Fix page break sample code block"
Width/Height set/get tests
Update pageSizeW and pageSizeH docs
Merge pull request #379 from spikex/master

Add missing setters for pageSizeW and pageSizeH
Revert "Add missing setters for pageSizeW and pageSizeH"
Merge pull request #389 from PHPOffice/revert-379-master

Revert "Add missing setters for pageSizeW and pageSizeH"
Extend HTML output for pagebreaks for PDF generation

Make HTML output of pagebreak compatible for the different PDF writers by combining:
http://mpdf1.com/manual/index.php?tid=110 (tested and working)
and
https://code.google.com/p/dompdf/wiki/FAQ (tested and working)
and
http://chandeshparekh.com/css-to-create-new-page-in-php-tcpdf-pdf/
[CHANGED] "README.md".
[CHANGED] "README.md". Added notice required about input escaping.
[CHANGED] "README.md". Added notice required about input escaping.
[CHANGED] "README.md". Added notice required about input escaping.
[CHANGED] "README.md". Added notice required about input escaping.
[CHANGED] "README.md". Added notice required about input escaping.
[CHANGED] "README.md". Added notice required about input escaping.