Added some things that will be used:

 - libraries
 - tools
 - keys
Updated the solution with strong names:

 - Created a set of intermediate assemblies XXX.Portable (that can be signed by the new key) that bind to the platform specific implementations
 -- System.Transactions.Portable - signed by the new key
 -- System.Data.Portable - signed by the new key
 -- Mono.Data.Sqlite - signed by the mono key
 - Updated the batch files to me more useful
 -- build.bat builds release
 -- nuget.bat copies output and packages nupkg
 - Created a TypeForwarding.tt to help re-create all the forwarding attributes
 - built the latest nupkg (1.0.0-alpha5)
Temporarily disable the DbTransactionTest for Silverlight as for some reason there is a declaration of DbConnection inside the unit test framework.