Create a CFPropertyList::Blob data type

[glarizza]

Previously, String#blob was being monkey patched to account for the differences between a regular String and a CFData binary data blob. This wasn't ideal as monkey patching String can cause difficulties tracking down errors.

To remedy this, a new data type, CFPropertyList::Data, was introduced to
differentiate between regular String objects and objects that contain raw
binary data.

[glarizza]

Just a couple of comments:

• All tests are passing, but there don't seem to be tests around binary data blobs
• I added a quick couple of tests, but I'm having problems matching in back slashes. I couldn't come up with a good way around them, but I figured you might have a suggestion :)
• The Blob class is creating a new CFData object and specifying the format of DATA_RAW by default. Do we want to make this a configurable option, or is it safe to assume DATA_RAW for any blob data?

I'm open for discussion!

[ckruse]

Hm, there seems to be a bug in rbCFTypes.rb… I have to have a closer look at it.

[ckruse]

about the DATA_RAW: this flag only determines, what the incoming data is. If you create a new CFData segment with Base64 input, you have to specify DATA_BASE64, otherwise specify DATA_RAW. It has nothing to do with the encoding, how data is encoded in plists is defined by the plist standard: base64 in XML and raw in plist.

[ckruse]

Hehe, the test fails because your input data is corrupted ;-) Try to open it with the PList editor. I fixed it in upstream

[ckruse]

Ok, everything seems to work. Can you confirm? I would release a new version

[glarizza]

Pulled down and all tests pass for me! Thanks for the insight and correcting the issue!

[ckruse]

Fine, I released a new version :-)