changed handling of transfer amounts as this lead ton an erro #28
Added test for bcmath in case the provided amount is a float
Merge pull request #29 from monofone/master

changed handling of transfer amounts as this lead to an error #28
Added BtchBookg Attribute in Header

BtchBookg gives the bank the information if it should handle multiple
transactions as one or many
Bugfix BtchBookg
BatchBooking null | 0 | 1
Merge pull request #31 from beinbm/BatchBooking

Batch booking
Allow to specify pain format on TransferFileFacadeFactory
Merge pull request #36 from mclois/master

Allow to specify pain format on TransferFileFacadeFactory
Merged with upstream master