- Prevent warnings with empty class path entries
# See issue #309
- Fix "Exception lang.Error (Call to undefined method io.streams.Streams*6::
  stream_cast()from scope img.io.GifStreamReader)"
- Do not run these tests with 5.5.0RC3
# See https://bugs.php.net/bug.php?id=65060
- Refactor image reading implementations, cope w/ PHP bug 65060
- Separate tests for JPEG, GIF and PNG formats into separate testcases
# ...which are skipped when the relevant format is not supported
# Prevents test failing with "No JPEG support in this PHP build"
- Separate tests for JPEG, GIF and PNG formats into separate testcases
# ...which are skipped when the relevant format is not supported
# Prevents test failing with "No JPEG support in this PHP build"
- Add workaround to PHP Bug with GD and user streams
- Refactor tests based on image type to only return when type is also supported
# Prevent "Fatal error: Call to undefined function imagejpeg()"