Merge tag 'v0.1.0' into develop

v0.1.0 - alpha release.
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
Added ability to pass arguments to wp_thumb verbatim. Allows cropping and tweak of images at specific breakpoints
Make sure that entire script uses an indexed array to store the breakpoint and image size data
Merge pull request #27 from BurfieldCreative/feature/wp-thumb-options

Feature/wp thumb options
Remove All
Core architecture files)
Markup patterns
Core fuinctionality file
comment simpliefied functon call
public responisve_markup output amend