updated readme.
beautified Respec config.
Added that art direction is the primary purpose of this spec.
As this is a HTMLWG spec now, changing to ED
Merge pull request #57 from ResponsiveImagesCG/fixed-respec-config

Fixed respec config
Merge pull request #58 from ResponsiveImagesCG/amended-abstract

Amended abstract
Merge pull request #60 from ResponsiveImagesCG/intro-section-fixes

Intro section fixes
As this is a HTMLWG spec now, changing to ED
Merge branch 'fixed-sotd-section' of github.com:ResponsiveImagesCG/picture-element into fixed-sotd-section
tidy up
Merge pull request #59 from ResponsiveImagesCG/fixed-sotd-section

Fixed sotd section
Started fixing up Interface definition
Merge branch 'fixing-interface-definition' of github.com:ResponsiveImagesCG/picture-element into fixing-interface-definition

Conflicts:
	index.html