* WT-2268 Change dump representation so every byte represents a single 0x00-0xff
Unicode character. Otherwise arbitrary binary data (that does not conform to
Unicode) cannot be represented. Fix an off-by-one error in counting bytes
on input. Added some better Unicode tests.
* JSON Dump now uses a 'dump version' stamp, as well as showing WT version.
Dump input that is too old, and input that is too new will be rejected.
* In setting a key for dump, converting a JSON string must always occur first.
* When loading JSON, treat binary data just like strings.
Fixed an error in determining the string length of JSON in the presence
of Unicode strings.
* Add LSM tests to JSON dump/load testing.
* Add more extensive testing for dump/reload of JSON binary data.
* Byte arrays differ from strings for JSON input, they do not null terminate.
Handle escapes like '\n', '\t', etc. on input.
* Added tests of JSON dump/load of all byte codes.
* whitespace
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