JPCSP v0.6 revision 1914

# PCSP v0.6 r1914:

* Improved VWBN instruction's implemention based on new findings.
* Implemented GE signals 32 to 47 behaviours' handling (TBPn/TBWn).
* Fixed writeVideoImageWithRange in MediaEngine.

# JPCSP v0.6 r1913:

* ExternalDecoder: improved automatic file detection. More audio's should be recognized and decoded.

# JPCSP v0.6 r1910:

* Slight improvement in the thread scheduling: improved compatibility to PSP for threads having the same priority (see comment in RuntimeContext).

# JPCSP v0.6 r1909:

* Improved R_MIPS_GPREL16 with new findings.
* Integrated UmdVideoPlayer with JPCSP's main runtime context.
* Provided an experimental implementation of VWBN Allegrex's instruction (based on Java's BigInteger).
* Implemented GE signals 17 and 18 (CALL and RETURN).
* Added newly discovered pspGeListOptParam type.
* Improved sceKernelStopUnloadSelfModule and sceKernelStopUnloadSelfModuleWithStatus and implemented sceKernelSelfStopUnloadModule.
* Implemented PSP_O_TRUNC handling in IoFileMgrForUser.
* Added small new finding to _sceSasInit.

# JPCSP v0.6 r1908:

* Improved compatibility of sceAtracDecodeData(end flag already set while returning the last samples).

# JPCSP v0.6 r1907:

* ExternalDecoder: improved automatic detection of audio files.
* JPCSP v0.6 r1906:
* Added draft for sceNetAdhocDiscover module.
* Improved overall UmdVideoPlayer functioning.
* Corrected and improved MemoryStick states' handling.
* Fixed a few typos.