forgot the stable tag.
corrected @since tag for modify_images function, per Gary
new function for captions. per issue #11
new function for captions. per issue #11
Merge branch 'develop' of https://github.com/robincornett/send-images-rss into develop

Conflicts:
	README.md
	readme.txt
removed deprecated remove_caption_style. simplified else conditional on handling captions.
corrected references for $image_id in fix_other_images
new get_image_variables. removed invalid alignment
center images, margins.
Merge branch 'develop'