wip sketched out ideas around support for structs and persistable maps
first pass at a revamped Bytes impl; slimer and more focused than the previous version, as well as more bounds checking when run in assert mode
in process of replacing Bytes with Bytes2
in the process of removing io.bytes.Bytes
moved the column code away from io.bytes
created Struct and Structs;  a cleaner replacement for TradeFlyWeight
working on Bytes2/Structs benchmark
removed the last use of the old Bytes object; Bytes2 has now been renamed to Bytes.  job done, rar.
project clean out; removed old and deprecated code and cleaned up compiler warnings
implemented two versions of PersistableMap; InMemory and Chronicle
checkpoint in implementing a journal
added checksums and benchmarks to new journal code
wip journal reader/writer
finished implementing the journal reader and writer
added PersistentStruct util
created a lite weight version of WrappedBytes, which has offset the cost of adding checksum tests to JournalReader and Writer;  also added the missing load fence to JournalReader