HTML: Show error details when minification fails

Fixes other problem mentioned in #288
Markdown: Fix parser for Unix line endings

I should research this more carefully; there may be a deeper mistake.
But this passes all unit tests.
Markdown: Better Tests

Conflicts:
	WebEssentialsTests/Tests/Markdown/MarkdownParserTests.cs
Markdown: Include \r in end-of-line checks
Markdown: Format test code
Markdown: Run all test cases against all newlines

Tests do not pass yet...
Markdown: Fix inconsistent test case

Also remove accidental duplicate test case
Markdown: Fix parser & classifier newlines

Parser:
Work correctly with single-character
newlines; don't consume them as content
characters.

Classifier: Don't use RegexOptions.Multiline,
which doesn't recognize CR.
Merge pull request #336 from SLaks/misc-fixes

Fix Markdown newline handling