Master

Otherwise, colors will not be as expected for RTF and ODT.

1. Converter is currently expecting colors as strings of hex digits,
   but PhpWord allows specification of colors by named constant, so
   result is random when one of those is used. This change handles
   all the named colors.
2. Table needs \pard at end; formatting may be wrong without it.
3. RTF writer will no longer ignore paragraph style for TextRun.
4. RTF writer will no longer ignore paragraph and font style for Title.
5. Add support for RTF headers and footers.
6. Add support for right-to-left in font.
7. Add support for PageBreakBefore and LineHeight for paragraphs.
8. Add support for PageNumberingStart for sections.

There are test cases for all of these changes.

Changes to doc-blocks and code suggested by Scrutinizer.

Some more editorial changes.

Fix PHPUnit tests on develop branch