This reverts commit 475b2be0.

Issue #2452
Issue #2384

When the call didn't result in an actual change (for example
line already had the given class), changeLine would return null.

This doesn't seem useful, and caused issue #2438. It now always
returns the line handle (as documented).

Issue #2442

Issue #2441

Issue #2438

Issue #2448

Issue #2447

Issue #2447

Issue #2439

Also fix Erlang mode to not return a non-standard token type.

Issue #2435

Issue #2438

Closes #2429

Issue #2427

Haxe supports imports with willcard
http://haxe.org/manual/modules#import-whole-package

Closes #2431

(It'll leave space for a scrollbar to the right of the sizer, though the
scroller does not actually have a scrollbar.)

Issue #2420

Issue #2412

Issue #2385

To prevent gaps when browsers interpret fractional numbers oddly.

Closes #2415

(Experimental for now. Prompted by indentation guide discussion.)

It assumed it saw all parts of the stream, and started
doing bad things when that was not the case.

Issue #2410

When line numbers are off, and the editor was initialized in
a hidden position, the gutters would sit on top of the text.

Issue #2365