Added test for checking whether a train object passes through a station
Implemented hashmap on top of TrainImpl to find out which stations are visited
Started work on the Timetable Loader which will store all the TimeTables
Added code to load Trains from a file into a Set
Added code to find all trains stopping at a selection of stations
Removed MainTest class as no longer needed
Refactored TimetableLoader
Added copy to lib folder
Added code to load data in Main class
Removed main operation
Renamed currentTimetableImpl to TimetabelMemoryImpl
Added serialization to al POJOs
Added unique identifier to Train
Added Disk implementation of timetable
Createda disk Timetable due to the enormity of the timetable
Updated README
Merge pull request #4 from etothepii/enhancement/3

Closes #3 allows the trains to be loaded from a file and stored there (to big for memory)