Securisation des transactions
	modified:   database/Database.java
	modified:   database/mongo/MongoDatabase.java
	modified:   database/sql/SQLDatabase.java
	modified:   exceptions/BeanException.java
	modified:   model/DataBean.java
	modified:   model/Transaction.java
	modified:   model/User.java
	modified:   servlets/TransactionServlet.java
	modified:   servlets/UserServlet.java
	modified:   utils/TransactionsUtils.java
	new file:   utils/UserUtils.java
Merge branch 'master' of https://github.com/steven89/if26_projet