Feature request: Support for parsing custom vcard field

[rostradamus]

Hi,
I was trying to find a way to get custom data in parsed VCard String but had no luck.
Is there an existing functionality to get additional custom data from parsed VCard?
If not, it would be really helpful if there is a way to fetch values of custom label (CUSTOM) like an example below.
If you are okay with me making a PR, I can try to implement and create a PR for it.

Suggestion:

final vCard = Contact.fromVCard(rawData);
String customValue = vCard.getCustomValue("CUSTOM"); // == "some_custom_value"
...

BEGIN:VCARD
VERSION:3.0
PRODID:ez-vcard 0.11.2
N:Some;Name
ORG:Somewhere
TITLE:Some Title
EMAIL;TYPE=work:test@example.com
TEL:1231231234
CUSTOM:some_custom_value
END:VCARD

Thank you.

[joachimvalente]

Hi @rostradamus and thanks for your suggestion! Because Contact doesn't support custom values it's unlikely I'll prioritize custom vCard values anytime soon. You are more than welcome to send a PR though, I'd be happy to review it!

[joachim-quis]

Update: check out the new version v2.0.0-beta.1, a full rewrite of this plugin. It still ignores custom or non-supported fields, so I'll leave this issue open as feature request.