7.4.0

#1363 - Run borders
#1558 - #1528 Adding numbering replacer on header and footer
#1552 - #1529 Add word break feature
#1523 - Improve documentation
#1491 - #1487 Create union type for IFrameOptions
#1384 - Fix reading template images in the browser
#1448 - Implement sample version of Comment feature.
#1562 - removed "both" as a verticalAlign feature