* Port the class preservation logic from BlockImage to InlineImage
* Add preservation for unrecognized classes
* Add the logic for collapsing spaces in the class attribute in more
places
Change-Id: I26faad7e00ab2f0a0f5d076552e56b32c692ae74
For nodes that handle their own children (as well as leaf nodes and
meta items), store the first child's attributes in html/0-0/*, the
second child's attributes in html/0-1/*, the second element's third
child's fourth child's attributes in html/1-2-3/* , etc.
This obsoletes the ad-hoc code that basically did the same thing in
MWInlineImageNode.
Change-Id: If5abd2d5d9c361b359617ff4b0f3d6ba4c9b0142
