Update CHANGELOG

[skip ci]

version 4.9

version 4.7.0.1

version 4.8

Remove now-redundant import from templates.hs

version 4.6.0.1

added abbreviatedFields to the CHANGELOG

Merge pull request ekmett#493 from corngood/master

Fix incorrect traversal generated by makeLenses when some constructors have no fields

Version bump and changelog for 4.4.0.2

Restore default namer for makeFields