Fix entity framework xml ids after change of RootNamespace
(https://github.com/npgsql/Npgsql/commit/6e32569)

After adding the root namespace, Npgsql Entity Framework xml files
weren't being found anymore. This patch fixes the name of those ids used
to find the files inside Npgsql assembly.

Thanks jjchiw for the patch:
https://github.com/jjchiw/Npgsql/commit/409a820e9f3265f9002de5bb37314e37a416a59c

Only applied the part about NpgsqlProviderManifest.cs file.
Merge pull request #139 from franciscojunior/fix-ef-resource-ids

Fix entity framework xml ids after change of RootNamespace
Minor nuspec tweaks

Titles and copyright
Renamed internal ReadOnlyDictionary

Renamed our internal ReadOnlyDictionary to
NpgsqlReadOnlyDictionary, to avoid name
conflict with the new .NET 4.5 class
Fixed silly nuspec error
Merge branch 'release-2.1.0' of https://github.com/npgsql/Npgsql into release-2.1.0
Bug Fix: Issue #141, ConnectionString: "AlwaysPrepare=true" not always honored

Fix NpgsqlCommand not always picking up the AlwaysPrepare connection string option.