updated readme to reflect linux/scons changes

updated readme to reflect linux/scons changes
Put correct date in copyright headers based on bk changesets

LICENSE:
    Updated copyright on license file
README:
    Updaded readme to reflect shift to scons and linux support
cpu/trace/reader/ibm_reader.cc:
cpu/trace/reader/ibm_reader.hh:
cpu/trace/reader/itx_reader.cc:
cpu/trace/reader/itx_reader.hh:
cpu/trace/reader/m5_reader.cc:
cpu/trace/reader/m5_reader.hh:
cpu/trace/reader/mem_trace_reader.cc:
cpu/trace/reader/mem_trace_reader.hh:
cpu/trace/trace_cpu.cc:
cpu/trace/trace_cpu.hh:
    updated copyright (only changeset in 2004)
kern/kernel_stats.cc:
kern/kernel_stats.hh:
    updated copyright

--HG--
extra : convert_revision : 726aed4b38ff4d230c63a570df83c63075b3c76f