Workaround for mono .NET 4.5 + ClaimsIdentity

Made sure to never have the function accessing the
WindowsIdentity type JITted under mono .NET 4.5.

https://github.com/npgsql/Npgsql/issues/133
NpgsqlCommand.AppendCommandReplacingParameterValues() and operators @@, @> and <@.

Fix bug that would turn operators @@, @> and <@ in ::, :>, and <: respectively.
Add tests for said operator butchery.
Merge pull request #134 from roji/133

Workaround for mono .NET 4.5 + ClaimsIdentity
Accept operator @@ for full text search queries

Example:
where search_vector @@ to_tsquery('english', @p0)
Find FieldIndex where column name use _

CreatedAt (field) == created_at (column name)
Issue #116 -  Tests
#116 Tests in NpgsqlTests Project
#116 fixing references

Removing EntityFramework.SqlServer from NpgsTests
#116 Removing App.config

Removing App.config from Npgsql.EntityFramework
#116 removing the key file from the tests folder
#116 Add to app.config <remove invariant="Npgsql"/>
#116 ConvertToUnderscoreCase if the first comparison fails
Windows integrated security #if directive for mono
Revert "Windows integrated security #if directive for mono"

This reverts commit af0548a13ba13d2194f1857d73ebcaf258087d5b.
Fixing rootnamespace
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of https://github.com/jjchiw/Npgsql

Conflicts:
	Npgsql/Npgsql/NpgsqlRowDescription.cs
	tests/EntityFrameworkTests.cs