Add changelog

CHANGELOG.md

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+# Changelog of OcLaunch
+
+## v0.1.4
+ + Add new command line option.
+   + “-r” can now take a number to start from.
+
+## v0.1.3
+ + Correct bug (See commit 4d20125a03c6f8735f39a95bb9e68a0476c89d45).
+
+## v0.1.2
+ + First public usable version.
+   + Create wiki.
+   + Use Oasis
+ + First version to be distributed with 0install.
+
+## Before
+ + Wast and test