Require $src only and allow all other arguments to be passed as an optional array of options
Simplify extraction of breakpoints from shortcode string. First step towards normalizing breakpoints array into an assoc array
Test to ensure we're dealing with string values
Added comments
Amended shortcode call to create_responsive_image function to use new args array syntax. Fixed unhelpful return value
Amend breakpoint markup builder function to test against array key rather than value. Matches new normalized assoc. array syntax
Adding TODO markers
Added correct key to test against to determine whether we are on the "Default" breakpoint
Removed unwanted comment
Merge pull request #26 from BurfieldCreative/feature/method-arguments

Feature/method arguments