Add HISTORY.md

Author: japgolly

HISTORY.md

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+History
+=======
+
+### 0.4.1 ([commit log](https://github.com/japgolly/scalajs-react/compare/v0.4.0...v0.4.1))
+
+* Upgrade to scalatags 0.4.0.
+* Component builder supports multiple callbacks.
+* JS source maps point to Github.
+
+### 0.4.0 ([commit log](https://github.com/japgolly/scalajs-react/compare/v0.2.0...v0.4.0))
+* Major overhaul.
+* Modules for Scalaz and testing.
+
+### 0.2.0 ([commit log](https://github.com/japgolly/scalajs-react/compare/v0.1.0...v0.2.0))
+
+### 0.1.0 ([commit log](https://github.com/japgolly/scalajs-react/compare/55a19e7...v0.1.0))
+