Change Log - Hag GUI for Cobra

v20100914 : 14th September 2010

New xml2gui unit for loading a hag gui from an XML file.
Added Get<Element>ByHook functions for accessing script/xml-loaded gui elements
Added canvas.hover boolean
Fixed memory leak when rendering drop down boxes
Fixed memory leak when changing the text of a hText element.
Fixed memory corruption leading to crashes when the text of a hText element is an empty string
Short strings containing Chr(10) linebreaks should now correctly break
Changing the text of a hText element now no longer writes to the debug log

Fixed horizontal slider rendering
Progress bar percent changes no longer Write to debug log
Faster text wrapping --- important change: the ascii text "\n" is no longer treated as a line break; use Chr(10) instead.

Sliders without divisions now return true for SliderUpdated when the slider position is moved, even if the mouse is still held down
Fixed scrollbars taking less z-index priority over some elements when finding the sprite hovered over by the mouse
Fixed SetScrollBarMouseWheelTargetElement not being exported
Fixed TextBoxSetFontStyle and TextBoxSetFontColor not working when the selection size was one.
Debug logging removed from some frequent-use functions

Changed license to standard MIT license
Added a Canvas GUI element and releated functions & procedures.
Added a ListBox GUI element and related functions & procedures.
Added a ScrollBar GUI element and related functions & procedures.
Themes updated to support ListBox customisations (new themes are fully backwards compatible with older versions of Hag)
Theme compiler updated to work with new themes (new compiler is fully backwards compatible with older themes)
Added experimental function CreateChildForm
Added procedure TextBoxSetFontStyle
Added procedure TextBoxSetFontColor
Fixed case where text-wrapping of hag text elements was sometimes ignored.
Fixed drop-down boxes not blocking clicks over all elements
Fixed drop-down box text positioning
Fixed drop-down boxes not clearing their list of options when freed
Fixed case where drop-down box sprites were re-created needlessly
Fixed FlushTextBox not fully clearing the textbox's update flags
Fixed HagFreeGuiTheme not fully freeing the existing theme images
Fixed several incorrect error and debug log strings
Fixed several incorrect code comments

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