Merge branch 'release/0.2.8' into develop
Remove webkit-specific search form attributes, add placeholder icon to #search.
WiP: Update Icomoon webfont sources and adjust various related theme code:

 * fix "StumbleUpon" option name (said "StumbledUpon")
 * remove #external margin-top CSS bloat
 * add references to documentation for typography and icomoon mixins to Sass sources
 * use a Sass list to generate classes for #external icons
Disable "Two Column Navigation" per default.
Rename %reset-ul to %reset-list, introduce %zero-margin-and-padding, tidy sidebar block margin and padding.
Disable "Show Post Footer Border" per default.
Move post tags above post meta, prefix tag with "#".
WiP: Ditch _icons.sass, fix icomoon mixin and make use of it.
Rename _font.scss to _icons.scss.
WiP: Fix ColorBox icons, bump Icomoon font sources, introduce $dog-ear-border-width.
Remove icons (clock/reblog) for .post .footer .date.
Tie .reblogged to .post instead of .footer .date, tidy CSS.
Update readme.
Merge branch 'feature/unify-search-input-appearance' into develop
Improve search input icon size.
Bump version number.
Update theme assets.
Merge branch 'release/0.2.9'