Add Transaction History about treasury

[lokka30]

Methods:

• In the Account interface: public Collection<BankTransaction> getTransactionHistory()
• In the EconomyProvider interface: public boolean hasTransactionHistorySupport()

Of course the first method mentioned will be changed to suit #37.

[MrNemo64]

While working on #31 I realized that depending on the structure of the BankTransaction we may have to change some things. If, for example, the BankTransaction holds a player and the amount that they withdraw/deposit then the withdrawBalance and depositBalance from the Account interface may also need to have an UUID player param so we can register who withdraws/deposits. There are some other methods that may need to change but these 2 are the first ones that come to my mind

[lokka30]

While working on #31 I realized that depending on the structure of the BankTransaction we may have to change some things. If, for example, the BankTransaction holds a player and the amount that they withdraw/deposit then the withdrawBalance and depositBalance from the Account interface may also need to have an UUID player param so we can register who withdraws/deposits. There are some other methods that may need to change but these 2 are the first ones that come to my mind

What if there is no player involved in the transaction?
For multiple players involved I think separate transactions would be fine.