Merge pull request #2827 from jonnybbb/master

[#2829] Enhance Loader API to allow for importing JSON data in addition to CSV data
[#2829] Enhance Loader API to allow for importing JSON data in addition to CSV data - Fixed warnings
[#2816] Manual shows wrong DefaultConfiguration constructor call for use with Spring
Include source code in pro edition. Exclude it in trial edition
[#2492] Add support for the MS Access database - Synchronise jOOQ Professional Edition with jOOQ Open Source Edition
[#2829] Enhance Loader API to allow for importing JSON data in addition to CSV data - Fixed warnings
[#2829] Removed unneeded nullString() method from the JSON Loader API
Mention Johannes Bühler as a contributor in the pom.xml
added JSON Loader Tests
LoaderImpl now uses same executeSQL method for indeepended of the import format