added Serializable interface
added standard getters and setters to allow use of XML serialization
made class implement Serializable
added standard getters and setters to allow use of XML serialization
now implements serializable
added standard getters and setters and constructor with no args to allow XML serialization
added parameterless constructor, standard getters and setters for XML serialization purposes
class now implements Serializable as well
Implementation of the flush method and a de-serialize method to wrtie to and read from file
Added some additional comments to methods
Also added a utility method for checking if a meeting exists
added parameterless constructor, getters and setters
junit tests for MeetingImpl