* implement transaction handler in c++
* add fake request object
* move general code into extra file
* improve error messages for RestJobHandler
* support cancel operation for async jobs with RestTransactionHandler
* fix integration test and add some optional debugging output
* fix returning of context
* fix error type
* fix code in cluster test
* remove unused variable
* working documents rest handler
* fixed cluster tests
* Consolidating database APIs
* clang-format
* Fixing issue with user creation through db._createDatabase
* replaced and refactored api-index and index api
* fixed cluster
* renaming some files
* added user methods
* removed files intended for later
* Fixed CC build
* Fixed method signature
* Fixing shell_server, shell_client tests