Create a test case for utf-8 bug reported by Diego Restrepo. Seems to be related to WikiWord chunk handling.
Add some other tests, and fix a minor bug in vendor/plugins/maruku/lib/maruku/ext/math/latex_fix.rb.
My REXML::Element.to_ncr (and REXML::Element.to_utf8) is horribly slow. For long documents, it proves more efficient to serialize to a string, apply String.to_ncr (or String.to_utf8) and then Sanitize the string.
Apparently, the form_spam_protect plugin only works with HTTP POST, not GET.
Unsafe operations (save and file-upload) should be POSTs anyway.
Fixed.
Also, two broken tests fixed. Only two Unit Tests now fail: both are minor bugs in XHTMLDiff.
In preparation for adding new tests, let's fix the existing ones.
3 Unit tests and one Functional test still fail.
* Two unit tests are bugs in xhtmldiff
* One is a bug in Maruku
* A file upload functional test fails, for reasons that escape me.
