Add uforead test for transformed nested components

[skef]

Suppose you have onequarter like this:

<glyph name="onequarter" format="2">
    <unicode hex="00BC"/>
    <advance width="850"/>
    <outline>
        <component base="one.numr"/>
        <component base="fraction" xOffset="370"/>
        <component base="four.dnom" xOffset="480"/>
    </outline>
    <lib>
        <dict>
            <key>public.markColor</key>
            <string>0,1,0.8,0.2</string>
        </dict>
    </lib>
</glyph>

one.numr like this:

<glyph name="one.numr" format="2">
    <advance width="370"/>
    <outline>
        <component base="one.sups" yOffset="-153"/>
    </outline>
    <lib>
        <dict>
            <key>public.markColor</key>
            <string>0,1,0.8,0.2</string>
        </dict>
    </lib>
</glyph>

and four.dnom analogous to one.numr. Our current tests don't seem to catch some transform logic problems when reading these nested components with offsets.