Added config option to allow for newlines in text when exporting to HTML

plugin/vimwiki.vim

@@ -369,6 +369,7 @@ call s:default('ext2syntax', {}) " syntax map keyed on extension
 call s:default('hl_headers', 0)
 call s:default('hl_cb_checked', 0)
 call s:default('list_ignore_newline', 1)
+call s:default('text_ignore_newline', 1)
 call s:default('listsyms', ' .oOX')
 call s:default('use_calendar', 1)
 call s:default('table_mappings', 1)