[ADD] Added method to get all entries from Database by one connection.
[FIX] Logical fix - do not add new entry for updated one in common
storage in RAM.
[FIX] Revert wrong understanding - replacing after update of entry.
[ADD] Added method to get all records stored in Records Table in
Database.
[ADD] Added method to list all records of specified entry (by id) from
Database.
[ADD] Implemented Comparable interface for Entry and Record classes.
[MODIF] Package access of getters in Record class changed to Public.
[REFACTOR] Eliminated duplicate code from database getters.
[ADD] Added method to fetch last 'size' records from the whole Database
as history of transactions.
[DOC] Documentation for getAllRecords() method of Database class.
[MODIF] deleteDatabases() method added, not tested. Static modifier,
where need.
[MODIF] Min SDK version changed from 14 to 16.
[ADD] Added delete methods for Database.