Fixing bug displaying tags

`display: inline-block` caused the tags element to be just slightly too
small (we're talking less than a pixel) which caused the entire tags
element to float above the rest of the meta-data, at least in Chromium on OS
X. Changing it to `display: inline` gave the correct results on
Chromium, Firefox, and Safari on OS X, and on Chrome and Internet
Explorer on Windows 8.1 (what I was immediately able to test).