Added --index-out option to specify each file path for torrent.
Here index shown in --show-files option is used to specify which
file path should be altered. For example, to change the file
path with index=2, use --index-out=2=aria2.tar.bz2. You can use
this option multiple times: --index-out=1=aria2.tar.bz2
--index-out=2=aria2-opt.tar.bz2. The short hand form -O is also
available. This option can be specified in -i list.
* src/DefaultBtContext.cc
* src/DefaultBtContext.h
* src/MultiDiskAdaptor.cc
* src/MultiDiskAdaptor.h
* src/MultiFileAllocationIterator.cc
* src/OptionHandlerFactory.cc
* src/OptionHandlerImpl.h
* src/Util.cc
* src/Util.h
* src/download_helper.cc
* src/prefs.cc
* src/prefs.h
* src/usage_text.h
* test/DefaultBtContextTest.cc
* test/MultiDiskAdaptorTest.cc
* test/MultiFileAllocationIteratorTest.cc
* test/UtilTest.cc