Added missing table configuration of ACT_CY_PEOPLE_LINK in MySQL and improved drop statements for that table in MySQL and MSSQL

Activiti Cycle: added support for EL-Expressions in Cycle Action forms. Added Request-scoped Context. 

Activiti Cycle: changed cycle connector configuration infrastructure, now supporting configurations for groups.

- Changed icons for task list
- Added new Activiti.widget.createCellButton for adding action buttons in a datatable

added commenting to cycle, added new cycleCommentService to cycle api, fixed mapping for comments entity

Activiti Cycle -  Architectural Refactoring: restructured MimeTypes, RepositoryArtifactTypes, ContentRepresenations and others using annotations. 

Activiti Cycle: partial rewrite of the SignavioSvgApiBuilder infrastructure. The builder is now aware of different types of nodes and highlight types.

adjusted Maven template for Cycle actions to latest changed (JavaDelegate & config) and adjusted version to 5.0

added tag methods required for tags in GUI to work properly. Still having problems with the implementation of the LIKE with MyBatis to find similiar tag names.

moved TAG connector to be the first folder
changed SVG API to use the local SVG as default (should be still moved to the connector config)
moved "beginTransaction" method to Interface (to avoid casting in CreateMaven action)

added "create maven project" action with template, fixed bug with folder creation in FileSystemConnector, made ID names in Developer friendly BPMN more robust

changed ID field length for MySQL since longer ID's are not supported

Added test case for all DAO methods
Refactored Entity names to have a common naming schema
added first hacky version of Signavio DIFF POC

Merged with changes on tag 5.0.rc1 rev. 1184: Fixed failing demo setup on mysql, oracle and postgres