* Fixed TIFF image save/load.
* Fixed quaternion arc() for vectors that are 180 degrees apart.
* Some tweaks in FXAtomic: more optimal code for non-PIC compiles; also,
check for PIE (position independent executable).
* Fixed problem in FXRex regarding non-ASCII characters.
* Repaired some broken syntax patterns in Adie.stx syntax file.
* SSE-ified lerp() API added to vector classes.
* Fixed SSE unaligned store problem in FXMat4d; exhibited itself on 32-bit systems.
* Setjmp()/longjmp() issue fixed in fxpngio.cpp.
* Operator FXbool in FXAutoPtr and FXRefPtr interfered with comparison operators;
removed it.
* Added API's to FXMat4 classes.
* Added serialization capability to FXExpression class.
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