Relax transformers package constraint.

Ignore-this: 4e3921dcc680e5275a8849c180352b16

darcs-hash:20140610195313-4d2ae-1a491f395c61adc4c20a895b08ace4294b486848
Fix crash when using Cmd-Q to exit program on MacOS.

Ignore-this: 1672402ac9c92532b59207f2b6659611

darcs-hash:20140610225627-4d2ae-2e437f33f36d4f2328209fa03108ecc1a703174b
Update changelog.

Ignore-this: e894771d34d2a901313afefbeb115b69

darcs-hash:20140610230349-4d2ae-579bdd8578dabd6dc8e3db5625615512e5acb0d4