figcaption matches figures's width

the width of "figcaption" match the width of the "figure" tag, while
preserving flexibility, responsivenes and keeping captions at the bottom
of the image.
SCSS Startup Pack

inlcudes of foundation's original scss files to start working with SCSS
compilers
Merge branch 'master' of https://github.com/NRG-R9T/reverie