It would not propertly update the gutter width.

The line calculation was ignoring paddingTop and scrolling.

Should help trigger #836, and is cleaner anyway.

Closes #840

When the editor is hidden, they can be null.

I don't know what they were thinking, but this, on
recent Opera versions, seems to give the correct
result.

Closes #10

Closes #745

Closes #754

Not linked yet. Beta comes out later this week.

It was accidentally calling global getSelection.

This broke right-click copy.

- Prevent "markdown_hrDashLong" test from failing when runHarness() is called manually.

- Render EM / STRONG within link text (closes #823).

- Add highlighting for images (closes #824).

They were completely broken due to really fragile use of html
selectors. Should work much better now in test framework.

Closes #796

Line widgets could make drag-select break before.

Closes #800

Since these no longer follow directly from scroller.clientHeight/Width.

Use these to ensure messages for current line are scrolled into view
in demo/widget.html.

Closes #802

Closes #808