adds shouldReorderColumn to CPTableView delegate methods
Merge branch 'master' of https://github.com/cappuccino/cappuccino
fixed reordering column with a restriction on a targeted column
changed condition order for optimization
added _lastDragDestinationColumnIndex to call delegate method only once
removed an extra blank and changed _shouldReorderColumn format
removed extra blank and added a blank line above if condition
Fixed: menus not closing on left click.

Previously, clicking outside a menu on a control would not close the menu. Also clicking on the menu header again would open a second menu.

This error was caused by the control receiving the click and starting its own tracking, depriving the menu of the mouse up event it was awaiting.

The behaviour to wait for the mouse up was wrong to begin with. Menus should close on mouse down.

This fix closes the menu on left mouse down anywhere but the menu, while still allowing the click to pass through to any control underneath the cursor.

Fixes #1833.
Fixed: modal sheet would appear briefly before animation

The AttachedSheet2 demo was calling runModalForWindow:, which caused the sheet to appear briefly as an application modal.

That call was removed, beginSheet: does everything.

Also:

- Wrapped _attachSheetWindow method into _attachSheet:modalDelegate: method.
- Just to be safe, in CPWindow -_sheetShouldAnimateIn:, the sheet is moved offscreen before being ordered front.
Fixed: CPGraphicsTest window wouldn't fit in 15" screen

I'm happy for those who have 27" screens, but on my poor MPB 15" screen, the CPGraphicsTest window was too tall to see everything.

I split the window into two windows so everything can be seen.
Fixed: _CG and _CP macros were confusing and could degrade performance

Previously, Cappuccino was using preprocessor macros internally for the CGPoint/Size/Rect/Inset/Affine functions, as well as for CPRange. These macros had the same name as the corresponding function, but began with _. The functions were actually defined using the macros.

The motivation behind using macros was to increase performance by reducing function calls. However, there were a number of problems with this approach:

- There was an artificial dichotomy between _CG macros and the corresponding CG functions. We never completely replaced CG function calls with _CG macros. In fact, they were often mixed up in the same file. There was an extra burden on the programmer to remember to use the macro instead of the function.
- If a method call was passed as an argument to a macro, performance could actually be significantly *worse* than a function call. For example, _CGGetRectMakeCopy([view frame]) would expand to `{ origin:{ x:[view frame].origin.x, y:[view frame].origin.y }, size:{ width:[view frame].size.width, height:[view frame].size.height } }`. So instead of a single objj_msgSend and a single simple function call, we ended up with 4 objj_msgSend calls, which are way more expensive than simple function calls.
- Because of this expansion problem, to use macros efficiently required us to remember to use variables for all macro parameters. This didn't happen, and shouldn't have to happen.
- Finally, with modern Javascript engines, function call overhead is so small that it really isn't worth using the macros.

This commit eliminates the _CGGeometry, CGAffineTransformation and CPRange macros and replaces them with function calls.

BREAKING CHANGE:
The macros are no longer available. They could only be used with compiled code, but if there is any user code that used them, they will have to be replaced with the corresponding functions.
Formatting
Fixed: if a sheet's parent window frame was changed, the sheet did not reposition

Previously, sheets were only repositioned if the parent window's setFrameOrigin: method was called. This did not cover all possible cases for parent window repositioning.

Now the sheet is repositioned any time the parent window's origin changes.
Fixed: sheet top shadow would not adjust when parent window was resized

It is possible to resize the parent window of a sheet while it is open. Previously, the sheet's top shadow was not adjusted when the parent window was resized, which could lead to it being out of synch.

Now the sheet shadow is adjusted whenever the parent window's size changes.
Fixed: resize masks for a few views in AttachedSheet2 demo were not set

Previously they floated, now they are anchored.
Fixed: sheet opening animation was not cleaned up when sheet immediately closed

Previously, if an event occurred during the sheet opening animation that would close the sheet, the animation was not properly cleaned up and the subsequent closing animation would die horribly.

The animation is always cleaned up with this commit.
Fixed: a sheet's parent window did not become main

Sheets are like child windows, they can never become main. Previously, when an attempt was made to make a sheet the main window, its parent window did not become main as it should have. Thus the title bar would remain dimmed, even though the sheet was the key window.

With this commit, when a sheet is made main, it defers to the parent window.
Fixed: windows with sheets were filtering mouse move events.

Previously, if a window had a sheet, a mouse move event was passed to the sheet and then filtered. This disabled resize cursors for the parent window of a sheet.

This commit allows mouse move events to continue to the parent window so that resize cursors will work on the parent window as well.
Fixed: under some circumstances, blur function could be called with no CPTextFieldInputOwner set

This would cause a crash because the blur function was trying to access the DOM element.

Now we check if the owner is null.
Fixed: removed stray #import.

Build was failing on Linux because of it.