code style consistency
simplified some logic when no length is found
winning length must be non-zero. fixes #190
Ref. #207 - Ignore non-`source` elements while parsing `picture` internals, halt upon encountering an `img`.
updated demo page to prep for beta (links and text)
update authors list
update bower version and pointer
update project version
Simplified `sizes` example.
Fixes paths on stand-alone `sizes` demo page.
Merge
Merge.