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.
Closes #208 - Removes rounding on candidate resolutions, preventing calculated `sizes`/`srcset` breakpoints from triggering a few pixels off from where they should.
Fixed typos
Merge pull request #209 from pborreli/typos

Fixed typo
img tag was missing the "img"
Merge pull request #210 from crohrer/patch-1

img tag was missing the "img"
Update Authors.txt
Update Authors.txt
`srcset` parsing test, currently failing.
`srcset` parsing tests for days, some of which currently fail.
Require lossless and alpha support for WebP

Testing for lossless WebP should help to avoid false positives when a
browser does not support lossless or alpha WebP.