Merged revisions 2407:2436 from 1.5 branch. CopyToScaling bug fix, big endian .x bug fix, STL loading fixed, binary attributes loading fixed.

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Merged revisions 2349:2403 from 1.5 branch. Added defines for version handling, added method to check for drivers. Fix bugs in Joystick handler, filename handler, and byteswap.

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 - Renamed texture setting function (setTexture) in most video drivers to setActiveTexture and made sure it has the same signature. This avoids confusion with similarly named methods in other classes (Such as SMaterial) and the consolidated method signature will hopefully help future plans for better abstracting texture usage across all drivers.

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Added some doc comments to IVolumeLightSceneNode.h and changed "colour" to American English "color" for consistency

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Fix indentation and disabling float texture formats where not supported. This will probably need some proper transformations instead on those systems.

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- Support for copy&paste on linux (X11) added (fixing bug 2804014 found by Pan)


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bugfix: CMountPointReader::openFile no longer returns file for empty filenames. Corresponding test added.


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- Reversed change in vector3d::normalize. The check for 0 vector isn't there for optimization, but to prevent NAN values.
  Works now again as documented and a corresponding test has been added.
  Does fix bug 2770709 (https://sourceforge.net/tracker/?func=detail&aid=2770709&group_id=74339&atid=540676)
- Animations can now be paused by setting the fps to 0.
- Avoid fp-precision problem in getPickedNodeBB (see also 
http://irrlicht.sourceforge.net/phpBB2/viewtopic.php?t=33838&highlight=). 
  This change might also fix the problem with picking nodes found by aanderse 
(http://irrlicht.sourceforge.net/phpBB2/viewtopic.php?t=32890&highlight=)



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- Fix simliar bugs where object have been dropped accidentally in set functions in many places


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change EGET_EDITBOX_CHANGED: triggers now only on user input not on explict changes (same like other _CHANGED events)


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- prevent editbox from recalculating its textbreaking each frame
- let spinbox react on each textchange without waiting for enter to prevent getting value changes without corresponding 
EGET_SPINBOX_CHANGED events.


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 - Changed line2d getVector implementation to match line3d (Was start - end, changed it to end - start).
 - Removed default values for R, G and B for SColorf constructor and added a default constructor that mimics the default values behavior.

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Oops, EMBSM_EXTRA1 and EMBSM_EXTRA2 not supported on linux, so removed from device and added comment.


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- allow stacking modal screens
- allowing hiding modals
- replace many IsVisible checks with virtual isVisible() checks in IGUIElement 


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- Add Shift+Control states to mouse event


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  Was reported by HackLeX in http://irrlicht.sourceforge.net/phpBB2/viewtopic.php?t=33371
- Fixed problem with highlighting menus when mouse was outside sub-menu area. Made it work similar to 
firefox menus.


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- improved window serialization


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As reported in http://irrlicht.sourceforge.net/phpBB2/viewtopic.php?t=25880&highlight=


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Use dummy texture in null driver and software texture only in software driver. Use the dimension function for optimal texture sizes instead of local one.

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Backport from ogl-es into the opengl driver: Use INCR_WRAP and DECR_WRAP when available even for the usual stencil algorithms, to avoid holes in the shadow.

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