Update _mixins.scss

add box-shadow and opacity mixin fix #46
Init src/scss/widgets/ path

with chat component
Update demo/page-overlay.html

add main wrapper with tupi.page-overlay class
Add image-caption component

fix #36
Update Gruntfile.js

add imagecaptionComponent in sass task
Update src/scss/custom.scss

add image-caption component
Init image-caption demo
Update scss/custom/page-overlay

add wrapper tupi&.page-overlay class
Update src/scss/build.scss

add component/image-caption
0.0.83