Refactored AnnotationToolHelper to a singleton pattern, so its functions don't need to prefix members with ATH. (This is pretty much the exact same content as a 2012-11-19 commit in the annotation-tool branch.)
 Refactored AnnotationToolHelper a bit, mainly with jQuery variable names. (This is pretty much the same content as a 2012-11-19 commit in the annotation-tool branch.)
Anno-tool Help section edits: (1) Moved compatibility subsection to the top,
(2) IE compatibility changed from "Unknown" to "May not work",
(3) More/better explanations in Settings subsection,
(4) labelling -> labeling, since we seem to be using American English everywhere else (like "color").
Anno-tool: Moved settings help, from the general Help section to another help dialog accessible from Settings.
Also, removed the help button that was next to the "Show machine annotations" setting, because that explanation is now in the overall settings help dialog.
Anno-tool: Help and Settings are now in sub-windows (which aren't modal, i.e. the rest of the page is still interact-able while the sub-windows are open).
Anno-tool: Sub-window minimum size was a little too small to fit Settings properly. Fixed it.
Anno-tool: Made brightness and contrast controls always visible, and greatly reduced that part's vertical size. Looks good in Firefox and Chrome at least.
Also, updated the Help/Controls to mention brightness and contrast, and account for the previously changed placement of the Help/Controls and Settings buttons.
Anno-tool: In the layout, changed previous/next links to three links: another, back, and forward. The correct links are NOT implemented yet though.
Anno-tool: Two-column layout is now based on a more tried-and-true method, from alistapart.
Anno-tool: The links for navigating to other images - "Go to another image", "Back", and "Forward" - now work. The history limit is 10, but can be changed easily.
Anno-tool: (1) Fixed logic error that would get the current image as the next image to annotate, if that was the only image left to annotate. (2) Dumb layout fix (hardcoded width) for the navigation part of the tool. (3) Changed wording to "go to next image", and added clarification to the tooltip.
Anno-tool: (1) Switched from jQuery hotkeys to Mousetrap, because it has fewer problems. (2) Got the navigation shortcuts to work in Firefox and Chrome.
Anno-tool: Changed keyboard shortcuts for navigation: sequences g n, g b, and g f. These only apply when not focused on a point. Also added an Esc shortcut for unfocusing any text field you might be on.
Anno-tool: Added a mod+s keyboard shortcut to save your work.
Anno-tool: Updated the Help/Controls.
Anno-tool: Added a page-leave warning if you have unsaved changes.
Browse: When you click an image/patch thumbnail, it now sends you to the annotation tool if you have edit/admin permissions, or image details otherwise.
Anno-tool: When the page loads, the page auto-scrolls down to where the annotation tool starts.