PlistHelper: Drop usage of the
it with a version that uses the native
CFPropertyListAPIs from the OS X
CoreFoundationframework, like the previous C extension did. Except this
time we use Ruby's Fiddle API (MRI >= 1.9.3) to interface with it instead of
the need to compile a C extension.
This release still includes a prebuilt version of the C extension for Ruby
1.8.7 support (OS X 10.8.x), but this will soon be dropped completely.