Updates 'Selected Work' section

Changes the list to <section>s; styles the 100% width layout.
Removes padding under h4
Adds <p> around work description o_o
Adds border under h3
Adds image to bella
beginning of images tyling for Selected Work
Adds screenshots to projects area
Adds back a tiny padding to h4
Wraps screenshot in links
Changes h3 to border-top
Right-aligns h4
Sets CSS link back to core.min
Fixes issues with background-size
Mobile padding now on block elements.

5% padding on <p>, h1-6 for small screens. This is to allow images to span full-width.
Sets css link to max