HtmlParser: Update the moe_configs so I can get 'moe magic' to work, and
record an initial equivalence.
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=51313399
HtmlParser: Down-integrate from public GitHub repository.

This covers changes from 19deb5af149f51833a751d1d64a7b809cbd1cb59 to 48738eaca9d449ea689cb6ad42f4d6761214cbd1, most of which are minor bugfixes or documentation changes.  The most substantive change is that generated files (the autoconf mess, and html5lib test data) was removed from the repository.  Doxygen may be removed next.
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=51313790
Merge conflicts.