Added the Implementation of Administrator analysis. 
1. The GUI for admin monthly analysis display and annual analysis.
2. The database classes to communicate with DB (all db tables are
accessible as JPA entities), and library dependencies.
Solving problem with file encoding, converting to UTF-8. Moving GUI
classes from package "internal" to "client" and DBService class to
"internal.db".
Merge pull request #4 from HotelTeam/vasilis

Final merge of the project