Remove duplicate CHANGELOG entries, and fix some old typos.
Remove duplicate CHANGELOG entries, and fix some old typos.

gopalindians/melonJS,srbala/melonJS,rlugojr/melonJS,gopalindians/melonJS,rlugojr/melonJS,rlugojr/melonJS,MarkoIvanetic/melonJS,srbala/melonJS,srbala/melonJS,gopalindians/melonJS,melonjs/melonJS,melonjs/melonJS,TukekeSoft/melonJS,TukekeSoft/melonJS,TukekeSoft/melonJS,MarkoIvanetic/melonJS