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added a black border around the icons in builtInFont.h, added the source bitmap. changed the way completely background transparency is handled in the bitmap font loader, the colour data for background is not kept.
changed default icon highlight value in the skin so the icons are highlighted in the same way as the text.

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Added two currently disabled OpenGL improvements for shadow volumes. Due to incompatible shadow volumes the extensions are not yet working.

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changed behaviour of IGUIElement::OnEvent so it doesn't always absorb events, and added getAbsoluteClippingRect.
fixed tooltip text on file open dialog's close button.
added some managed marshalling bugfix things where I missed them earlier.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@751 dfc29bdd-3216-0410-991c-e03cc46cb475

all devices now log an error message if the video driver is unknown.
fixed serialization of new variables in IGUIEditBox.

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added automatic scrolling when dragging text with mouse

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Added setDrawBorder to IGUIEditBox and IGUIStaticText. 
Added setTextAlignment to GUIEditBox and IGUIStaticText, for text justification and vertical alignment.
IGUIEditbox now supports multiple lines using setWordWrap and setMultiLine.
IGUIElement now calls getter and setter functions when serializing, in case of getter/setter overrides.

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changed operators on classes that used linear_search (only used in string comparisons)

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typo in compile config comment

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changed the docs of quaternion to state the euler angles used are in radians, this seems to have confused someone on the forums, so it did me before. check I'm right about this.

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changed the scene manager's registered node arrays to use set_used(0) rather than clear() to avoid unnecessary reallocations

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@720 dfc29bdd-3216-0410-991c-e03cc46cb475

fixed a bug when trying to load fonts with uppercase letters in their names in case sensitive filesystems

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Box = Mesh->getBoundingBox(); //can we remove this, the box is set on 'setMesh', and without it the user can set their own boundingbox (if the normal one is too small) without it being overwritten

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