Make jquery.colorbox optional.

 * separate colorbox-CSS and -JavaScript from masonite.css/masonite.js
 * introduce global JS object "masonite" containing all theme configuration variables
Update readme.
Update readme.
Update readme.
Update readme.
Update readme. :)
position:relative for .post.

Fixes positioning of a.reblog for #index.no-js (and #single).
Reblog links really only on #index pages.
Move .reblog link into .post .footer.
Don't wait for imagesLoaded to center content/place #header.
When the "Centered Content"-option is active, position #header and #copyright via CSS until we figure out if there's space for more than one colum via JavaScript.
Merge branch 'feature/improve-centered-layout-mode' into develop
Fix #header/#copyright margin-left for the default .post width in case of activated "Centered Content"-option.
Fix #header/#copyright margin-left for the 500px wide posts in case of activated "Centered Content"- and "Header Left"-options.
Fix position of #header and #copyright on #single post pages…

when "Centered Content" is activated but the default post width of 400px isn't overridden via "500px posts".
Add option to upload an alternative avatar/logo…

via Tumblr's "Customize"-interface; it will replace the existing Tumblr avatar.
Bump HTML5Boilerplate CSS to edge.

Yay OCD :)
Update some more HTML5Boilerplate snippets.
Move a bunch of JS around.
Update readme.