Adding several Camt054.v4 Options

[teslina]

Adding

$xmlDetail->Amt 
$xmlDetail->RltdDts->AccptncDtTm
$xmlDetail->Chrgs
$entry->Chrgs

This is my very first contribution on GitHub, so please bear with me ;-)

[frederikbosch]

@teslina Thank you for taking the time to create a PR to this library. I am happy to help with your first PR. This library contains unit tests to test that the code actually works. Have you ever worked with PHPUnit? Before I can merge it in, your code should have some testing coverage. In any case, the current tests should pass. As you can see on Travis this is not the case at the moment. Good luck!

[teslina]

@frederikbosch Thank you :-) No, I haven't worked with PHPUnit before. I did some testing with another, independent script, which I haven't commited. But I'll look into PHPUnit and check if I'm able to add some proper tests :)

[sdespont]

Hi @teslina,

I will certainly use this project for Camt054.v4 files decoding in the next weeks. As the maintainers cannot ensure that the library is fully functional for this kind of file, can you tell me if you manage to use it?

Best regards,

Sébastien

[frederikbosch]

@Einenlum This PR looks OK to me. Only additions. Nothing more. Merge it in?

[teslina]

Hi @sdespont
I haven't completed my work on decoding the new Postfinance Camt054.v4 files yet - unfortunately, I had to put my work on ice for the past few weeks. But you certainly can use this library. If some options are missing, simply add them :)

[sdespont]

@teslina Thank you for your feedback.