Update package references

Pinning to 1.2.11 to be compatible with Azavea.PDF and to avoid 1.2.12
which includes an automatic assembly directive that is a duplicate of a
directive that all of our libraries already contain.
1.2.0
Use improved pack and push scripts
Merge branch 'nuget' of github.com:azavea/net-dao into nuget
1.2.2 - Updates for NuGet

* Pin log4net to version 1.2.11 (because we can't upgrade itextsharp, which uses it)
* Scripts for packing and pushing NuGet package use their own "nupkg" folder
1.2.3 - Don't pin log4net to v1.2.11
Update target framework to .Net 3.5
Add interfaces for multi-table joining functionality
Add new join criterias for joining to multiple tables

New Criteria types are necessary to ensure that all join criteria provided
indicate which table their property(s) apply to
Pull helper functions out of FastDAO for use in other files
Add multiple table joining for SQL based FastDAOs
2.0.0