Changed repository ownership

This release is the first one after changing repository from com.github.sergiofgonzalez to com.accenture.
Additionally, the following relevant changes has been added:

• Added new methods safeGet and getOrElse to the API:
  • safeGet tries to find a value for the given key and does not throw an exception if not found
  • getOrElse tries to find a value for the given key and returns the given default value if not found