Rename parameter AllowQueryEvaluateOnClientSide

Both the inline xml docs and http://blogs.msdn.com/b/fsharpteam/archive/2012/09/22/the-freebase-type-provider-sample-static-parameters.aspx say the parameter is named AllowLocalQueryEvaluation
Improve freebase runtime error messages

The exception .ToString will already print the message from the inner exception, so put the freebase message first, makes it more clear when we hit the requests limit
Describe SendingRequest event in Freebase docs
Fix typo
Hide freebase implementation methods (#34)
Hide freebase implementation methods (#34)
Improve debuggability of freebase provider code
Improve debuggability of freebase provider code
Fix for #82
Merge pull request #81 from ovatsus/master

Small freebase improvements