Updated JRE to 7u21

From https://github.com/UniversalMediaServer/UniversalMediaServer/commit/15370f4252e0b4eeec841754bb180779dc131454
Fixed audio sync when muxing DTS via FFmpeg

From https://github.com/UniversalMediaServer/UniversalMediaServer/commit/b5cc16a5dc5d1d65f429b4abb7e6404fad06b601 and https://github.com/UniversalMediaServer/UniversalMediaServer/commit/575d5489e58cdc4083a00b5a4dd3005852357636
Replaced the maximum buffer limit in the setting description with the recommended (default) value

From https://github.com/UniversalMediaServer/UniversalMediaServer/commit/ef897a664394063a5756bafcdfedaf6e6210b5af
Language tweak

From https://github.com/UniversalMediaServer/UniversalMediaServer/commit/5b15720cf92f91f466155920a08a9c3fdae794c7
WEB.conf:
- Added support for the file:// protocol
- Match protocols (e.g. mms://...) before extensions (e.g. http://example.com/foo.mms)

From https://github.com/UniversalMediaServer/UniversalMediaServer/commit/c5a301b6be1eea3d19ca58d8cc30ee33db16a632
Fixed "Can't assign requested address" bug after update to Java 1.6.0.45 on Mac OS X

From https://github.com/UniversalMediaServer/UniversalMediaServer/commit/b7be6732328677456527c11cfe4d0fc38270b8da
Add installation instructions for Linux

From https://github.com/UniversalMediaServer/UniversalMediaServer/commit/ccf5fc781439ea86b9d0b01a04cd5bd3450cd7a7, https://github.com/UniversalMediaServer/UniversalMediaServer/commit/88b050f9e26020bcbce2393a8cb02277d21efc7f, https://github.com/UniversalMediaServer/UniversalMediaServer/commit/abd96078fc35071702143791bff59a02b4d5a56c and https://github.com/UniversalMediaServer/UniversalMediaServer/commit/e6249e7d1e94927cb78293daf3b15d93d7152d7f
Fixed incorrect server IP address when starting UMS by launching UMS.exe or UMS.bat

From https://github.com/UniversalMediaServer/UniversalMediaServer/commit/19478faa779fbdcb3250ddd09cf04ee0a03236b2
Updated changelog
Bumped version to 2.6.2
Official release of 2.6.2
Merge branch '2.6.2' of github.com:UniversalMediaServer/UniversalMediaServer into OSX

Conflicts:
	src/main/java/net/pms/network/UPNPHelper.java