Bug fixes, API cleanup, WebCrypto, and Haste.App breakout.

0.5.5.1 release: minor bug fixes and preinstalled libs.

0.5.5.0 release: misc. bug fixes and Binary instances.

0.5.4.2 release: error handling and regression fixes for Haste.Foreign.

0.5.4.1: minor compatibility fixes

0.5.4 release: bug fixes and slightly better JSON/Foreign APIs.

0.5.3 release: performance enhancements and configurability.

0.5.2 release: touch events, better docs and bug fixes.

0.5.1.3 release: bug fixes and Haddock improvements

0.5.1.2 release: sandbox fix for 0.5.1.0