sysinfo.h: Show whether TPIE_USE_SNAPPY is set.
Add stream_speed_test_2.
Introduce stream_accessor_base and make read_block and write_block virtual.
Fix include cycle in stream_accessor_base.h.
Switch to compressed_stream_accessor.
Fix header guard in compressed stream accessor
Fix ut-file_count
Change tpie::file_accessor::file_accessor to be the abstract base class
Use non-compressing stream accessor in stack.
Assert that blocks are not overwritten in compressed streams.