Replace colored rectangles with images from a folder

[dhowe]

• [Climate] Identify set of common ad aspect-ratios #45
• implement image sizing and placement code
• add new text plus styling (pending further mockup images)

[Real-John-Cheung]

basic image placement done in 12e3169

for some reasons it is not working on chrome yet seems that the image will be block by adlipo itself in chrome, kind of strange

[dhowe]

great -- as you are testing, if you see any interesting screenshots (like the one above), please save them
I've created a 'screens' folder at the top level with the above image inside (please take large-size screenshots when possible)

[Real-John-Cheung]

fix for chrome with dd3597c

I think now the image placement is basically done

[Real-John-Cheung]

background image and frame are done with 6b6902c

waiting for new text