Avoid unneeded resizing of images in default and Tygers styles.
Merge pull request #152 from barijaona/bugfixes

Avoid unneeded resizing of images in default and Tygers styles.
Default Style: refactored CSS for modernity. Removed gradient image asset and wrote CSS property to give a pure css gradient. [ No more gradient banding! :) ]
Bohemian Cinema: Something was MEGA wrong with the HTML and CSS files on this style. Fixed them. Attributes that were once showing are now working. Code refactor.

Note: Candidate for removal completely?
Tyger Style: Refactored code. Did header gradient in pure CSS. Eliminated redundancy.
Deleted Tyger Graphite style because it's the same as Default Style.
Front Row Style: Refactored to remove images. Represented images in gradients. Got rid of G-d awful table based HTML layout.
Removed Prague style as it was just a blown up version of Prague-Light
Added a serif style called "Serifim Dark"
Added a serif style called "Serifim Light"
Revert "Deleted Tyger Graphite style because it's the same as Default Style."

This reverts commit f31f0a3fbcda9844973af5cb7862d049fd22ee53.
Adds a new app icon by @romiq (from Cocoaforge) and me.
Removes deprecated styles
Adds @barijaona's fork of Minimalista themes
Vienna 3 icon
Renamed icon
Removes Nibblous as a feed as it seems to be a dead blog
Updates feed url for BBC World News
Updates URL for World of Apple
Updated URL and name of Mac OS X Hints feed