Updated Match query to take different Fuzziness
Minor tweaks to the GetFuzzinessValue method

A tad more explicit.
Small refactor in BaseParserTests

That I didn't need after all, but I left in :)
Fuzziness converter logic FuzzinessConverterHelper

All logic in ```FuzzinessConverterHelper.ReadJson()```
Tests that exercise both the ```FuzzinessConverter``` and
```MatchQueryJsonConverter``` to test ```FuzzinessConverterHelper```
Updated BaseConverterTest to inherit BaseJonTests
Made the MatchQueryJsonConverter use the FuzzinessConverter

Now the MatchQueryJsonConverter uses the FuzzinessConverter to
deserialize IFuzziness.
This removes the ugly object creation in FuzzinessConverter to get the
object into a unified format.
Merge branch 'fuzziness-alignment' of https://github.com/andersosthus/elasticsearch-net into andersosthus-fuzziness-alignment
Merge branch 'andersosthus-fuzziness-alignment' into 2.0