add note on SQL server row versioning

[Mike Bayer]

i.e. ALTER DATABASE MyDatabase SET ALLOW_SNAPSHOT_ISOLATION ON

 ALTER DATABASE MyDatabase SET READ_COMMITTED_SNAPSHOT ON

http://msdn.microsoft.com/en-us/library/ms175095.aspx

etc.

since everyone including me gets blasted by their frigging locking model

[Mike Bayer]

3f2e91314f32384fde4d9c6d7f44e0e98a071f09 6882cb17e9eb56b137fa4c2ac2ba736aa286c35d

[Mike Bayer]

Removing milestone: 0.6.7 (automated comment)