Major overhaul to the I/O functionality:
The SequentialStremMultiplexer (SSM) has been replaced by AosIOStream.The AosIOStream class acts like a BaseSequentialStream but consists of multiple AosIOChannels.Each AosIOChannel again implements a BaseAsynchronousChannel and thus is a derived class of BaseSequentialStream as well....
Modified aos_unittest.h/.c files to prevent unnecessary includes.
slightly enhanced some of the makefiles
removed module specific configurations from the makefiles
Major overhaul to AMiRo-OS version 2.0.0