Adding createdby, creationdate, lastupdated, lastupdatedby to Actor

Adding "createdby", "creationdate", "lastupdated", “lastupdatedby” to CultureFeed_Cdb_Item_Actor

Introduction of PSR-2 coding standards on lib and tests and small fixes

Small fixes

• 875c762 adding missing switch on keywords actors when using cdbxml 3.3
• 88d7f9c adding umv category
• 09dcc12 From opening times not required anymore

Adding availableFrom, availableTo, creationDate and creationBy

v2.1.1

Implement cdbxml schema version 3.3

Changes from 2.0.2

• Implement additions in cdbxml schema version 3.3
• Keywords are now represented as CultureFeed_Cdb_Data_Keyword objects, although
  discouraged strings can be still used for backwards compatibility reasons
• Add cdb scheme version parameter to CultureFeed_Cdb_Default constructor,
  CultureFeed_Cdb_Item_Event::appendToDOM() etc. to allow different versions of
  cdb xml to be produced
• Deprecated CultureFeed_Cdb_Default::CDB_SCHEME_URL in favor of
  CultureFeed_Cdb_Xml::namespaceUriForVersion()
• Add new media type collaboration

Fix order of reltype element in File

• 1d0d675 fix order of reltype element in File

v2.0.1

• Extract agefrom with value 0 correctly