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
Merge pull request #6 from maurizi/multiJoinSupport

Multi-table join support