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All gui-elements now use "SColor" instead of "const SColor&" to unify interfaces somewhat (it doesn't really matter which way it's done - the only bad solution is doing it different in every second function). I don't dare changing the one occurrence of "const SColor&" in IGUISkin as skins are so often overloaded and so changing that would break too much user-code, will do that once IGUISkin is more seriously reworked. Sorry for anyone already overloading gui-elements IGUIEditBox, IGUIListBox, IGUIStaticText - you will have to change that as well. But I think in the long run it's better having this at least a little less inconsistent. 

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Messed up last check-in somewhat. Now all getColor functions in statictext avoid const& (which is OK as SColor is just a long).

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Add getBackgroundColor, isDrawBackgroundEnabled and isDrawBorderEnabled to IGUIStaticText (thx 4 patch from Nalin).

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Add flag to avoid duplicated skinning in one frame for the same mesh and animation frame. Needs to be checked if all cases where a setting has changed and skinning needs to be applied, has been properly marked and resets the flag.

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- CSceneNodeAnimatorCameraFPS uses now SKeyMap instead of SCamKeyMap (structs were identical which was confusing and there wasn't any explanation in comments, so I decided to simplify it).
- Add some workaround to MeshViewer to show how we can currently fix the FPS-cam when users to alt-tab while moving. We can improve that some day when we have focus-events, but this works for now.

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- Avoid one call to OutputDebugStringA in logging (OutputDebugStringA got very slow when debugging since VS2010)
- Demote a few logging outputs in COBJMeshFileLoader from ELL_INFORMATION to ELL_DEBUG.

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Merge from 1.7 branch, revisions 3877-3908. Fix for getSphericalCoordinateAngles, some warnign fixes, md2 normal fix, several GUI fixes, isPointInside fix, zip endianess fix.

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Fix rendering with only index buffers. Basically, this is now removed, because d3d seems not to support this. Hence we can only render with hw buffers, if both vertex and index buffers are enabled.

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Thanks to Auria, this fix makes octree work with mixed lightmap meshes (i.e. meshes which mix meshbuffer types). Most b3d files do this, and now work properly with octree support. The fix is right now not perfect, because of incomplete tangent vertex creation in case this vertex type is also used. But fixing also this issue would mean a huge rework of the octree, which has to wait for now.

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Fix rotationFromTo as suggested by AgentD, using the from vector instead of the current values from the quaternion. After all, this quaternion has nothing to do with from or to so far, so the values contained there are rather arbitrary. Moreover, I'm normalizing the quaternion before returning it, as it is a rotation quaternion, which should be a unit quat. Test cases are also extended. For now only in trunk, may be backported after further testing.

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CGUISpinBox range does now also use decimal places to avoid getting endless loops in setValue/verifyValueRange.

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Collada writer sets now set and input_set for TEXCOORD input and bind as some Collada tools want that (doesn't care yet about second UV-set, but also does not make it worse).

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CSceneCollisionManager::getScreenCoordinatesFrom3DPosition uses now getCurrentRenderTargetSize instead of getScreenSize.

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