Merge pull request #86 from ivanlanin/develop

New features: (1) multicolumn section; (2) table width; (3) table row repeat as header & break across pages; (4) superscript & subscript font
Changelog : Feature for columns in section, continuous section break, softbreak, hanging paragraph, and normal style
GH-51 : Adding a value that contains "&" in a template breaks it
PHPWord_Shared_Font::pointSizeToTwips