Tidyup testsuite code, according to newly enabled compiler warnings.

Code cleanliness fixes.

Improve code cleanliness to avoid future bugs.

Data.CSS.Style.Selector.Index: fix potential crash.

Code cleanliness: Interpret Data.CSS.Style.Importance.splitProperties return value correctly.

Factorize out cascade logic.

Add method to override CSS inheritance.

Parse HTML 'style' attributes.

Have Stylish HTML Conduit depend on a non-buggy version of Stylish Haskell.

Fix parser freezes, blocking issue for Rhapsode.

Fix incorrect handling of invalid syntaxes.

Improve traverseStyles type signature.

Allow differing output types and give text nodes style if they want it.

Improve concision of Stylish HTML Conduit's API.

Draft html-conduit to Stylish Haskell bindings.

Initialize stylish-html-conduit sidemodule.

Ignore invalid selectors.

Aid attribute sorting, fix install of internal modules.

Fix cabal file.

Test override styles.

Test cascade logic.