Not taking into account the caps tag

```
			<w:r w:rsidRPr="00A06974">
				<w:rPr>
					<w:rFonts w:ascii="Arial" w:hAnsi="Arial" w:cs="Arial"/>
					<w:caps/>
					<w:sz w:val="20"/>
				</w:rPr>
				<w:t xml:space="preserve">aaa</w:t>
			</w:r>
```
Should come out as AAA

Find any other tags that are similar to this one and implement them as well:

http://www.schemacentral.com/sc/ooxml/e-w_rPr-5.html

EDIT

After a brief look I suspect we will need to implement:
```
w:caps - Display All Characters As Capital Letters
w:smallCaps - Small Caps
w:strike - Single Strikethrough
w:dstrike - Double Strikethrough
w:vanish - Hidden Text
w:webHidden - Web Hidden Text
```