[MODIF] Pass description string into Entry class ctor.
[MODIF] Store Entry's ID in database as Primary Key. Assing 0 ID for the
very first instance of Entry in database.
[MODIF] Auto increment entry id once read from database.
[ADD] Implemented addEntry() method, cache new Entry instance in hashmap
and put it into buffered queue to further write into database by writer
daemon thread.
[REFACTOR] Incapsulate Entry ctor with custom assignable ID with
package-access to make access only for Database. MoneyWatcher manager
class could only create fresh Entries and Records without any control of
instances' IDs.
[MODIF] Changed initial id from NULL to '1'.
[MODIF] Autoincrement ID in tables.
[REFACTOR] Marked store() methods deprecated.
[ADD] Added getter and setter for Entry's title field.
[ADD] Added getter and setter for description field of Entry class.
[ADD] Added getter for final field 'create DateTime' of Entry class.
[ADD] Implemented insert methods of Database class.
[ADD] Handle exception in Insert method of database.
[MODIF] New implementation of store() method for Entry and Record
classes.
[STYLE] Made new comment header for package-access methods in Record
class.