Introduce config entities as editable configs
Added new implementation of callback for sql
Appended coding styles, fixed SQL syntax and some comments
Added delete functionality, fixed setOption Method in CallbackSQL
Update README.md

added example SQL create table statements
Update README.md
fixed constructor DocBlock
adapted signature of private method to comply with th econstructor's signature
improved documentation
improved documentation
Merge pull request #3 from Niehztog/master

new feature: CallbackConfigSQL