Image, Flash: Purge data immediately if meta tags cannot be found.
Image, Flash: Take dimensions from the loader.

For the cases when width and height cannot be extracted from the byte
array. Address #91.
Image: Enlarge MAX_RESIZE_WIDTH and MAX_RESIZE_HEIGHT.
Image, HTML5: Extract embedded thumb from JPEG, when available.
Image, HTML5: Cleanup ExifParser.
Image: If thumb data available in meta object, use it when creating thumbs.
Blob: Theoretically substr should be faster than regexps test.
BinaryReader, HTML5: Add length() method.
JPEG, HTML5: Extract thumb dimensions with the binary data.
Image, HTML5: Store thumb data as blob.
Image: If embedded thumb data available and dimensions are big enough, use it, instead of the full size clone.