Update the ChangeLog for 0.7.5 stuff.
Update the ChangeLog for 0.7.5 stuff.

--HG--
branch : v0-7

cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two