xpaulbettsx/NSync — pull request #3 by xpaulbettsx (2012-03-17 21:51:28+00:00)
Title: Create delta packages

[Delta packages](https://github.com/xpaulbettsx/NSync/commit/41832491abd2b417c2b58cc84d86be3cf140a5d9#L0R45) are packages which are based against the previous version of a NuGet package. They have all the same metadata as a regular package, but instead of the actual files in `lib`, they have one of three things for each file:

1. A zero-byte .diff file (i.e. the file hasn't changed from the old version, but still exists in the new one)
1. A non-zero .diff file (the file has changed, here is the bsdiff to apply to get the new one)
1. A normal file (the file is new in the latest version)