Convert image 4.7

Convert image v1.6 changes:

Remove no longer needed EXIF rotation code.

Convert image v1.5 changes:

Updated PHP code, fixed issue dealing with animated gif's.

Convert image v1.4 changes:

Fixed problem dealing with attach_count. If the attach_count is incorrectly set to 0 when there are attachments in the post, it can result in inline embedded attachments showing as links instead of an image.

Convert image v1.3 changes:

Updated server error log phrases in PHP file.

Convert image v1.2 changes:

Updated addon.json file.

Convert image v1.1 changes:

Fixed problem with Log file.