io: added io::read(), io::write(), io::append(); fixed FileInput,

include/elm/alloc/DefaultAllocator.h

include/elm/data/ArrayList.h

include/elm/io/BlockInStream.h

include/elm/io/BufferedInStream.h

include/elm/io/BufferedOutStream.h

include/elm/io/FileInput.h

include/elm/io/FileOutput.h

include/elm/io/StringInput.h

include/elm/io/io.h

include/elm/string.h

include/elm/string/AutoString.h

include/elm/sys/Path.h

include/elm/sys/SystemException.h

src/alloc_DefaultAllocator.cpp

src/checksum_MD5.cpp

src/doc.h

src/io_IOException.cpp

src/io_Input.cpp

src/io_Output.cpp

src/sys_JobScheduler.cpp