Merge pull request #223 from ovatsus/Async

Async loading for XmlProvider and JsonProvider
Merge pull request #229 from ovatsus/Async

Fix SafeMode when there's more rows than the InferRows limit
Update RELEASE_NOTES.md
Merge pull request #230 from ovatsus/Async

Fixed XmlProvider SampleIsList not working correctly
Update RELEASE_NOTES.md
Merge pull request #232 from ovatsus/master

Improve SignatureTests
Csv readlines was reporting incorrect line number on files with \r\n newlines (causing the "SafeMode works when inferRows limit is reached" test to fail) and also on csv files without headers