Remove reference / reliance on Flex classes

[GoogleCodeExporter]

The following class reference / use classes from the Flex framework. This
makes it difficult to use the library in non-Flex content and applications.

com.adobe.crypto.SHA1
import mx.utils.Base64Encoder;

---
com.adobe.crypto.SHA224
import mx.utils.Base64Encoder;

---
com.adobe.crypto.SHA256
import mx.utils.Base64Encoder;

---
com.adobe.crypto.WSSEUsernameToken
import mx.utils.Base64Encoder;

---
com.adobe.fileformats.vcard.VCardParser
import mx.utils.Base64Decoder;
import mx.utils.StringUtil;

---
com.adobe.utils.DateUtil
import mx.formatters.DateBase;

---

The most important one is DateUtil as that seems to be used by a lot of people.

Original issue reported on code.google.com by mikechambers on 2 Jul 2008 at 3:08

[GoogleCodeExporter]

Original comment by mikechambers on 2 Jul 2008 at 4:16

• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

We either need to remove the reliance on the flex classes, or move them into 
their own package so it is clear 
they rely on Flex (similar to what we do with the AIR classes).

Original comment by mikechambers on 21 Sep 2009 at 5:09