Changes between Nightly builds

Hi,

I would like to know the bug fixes / changes between the nightly builds.
(For example: Changes between 2015-02-05 & 2015-02-07 of smartgwtpro-4.1p builds).
Is there any document to identify the changes ?

Release notes doesn't have the information about the changes between minor versions.
Path: smartgwtpro-4.1p\release_notes.html

Thank you.