Last Command Sent Improvements

Store last command sent for extended queries, too.
Decorate last query sent depending on how it was sent and what it was;
  A query can be simple, a parse or prepare command, or execute a prepared statement.
  On execute prepared, keep the actual prepare command.
Mediator.ResetResponses() became useless; remove it and all references.
Create NpgsqlQuery classes for protocol version 2 and 3.
Set last query sent in NpgsqlCommand, not NpgsqlQuery.
NpgsqlCommand.ExecuteBlind()

ExecuteBlind() is now static, eliminating all NpgsqlCommand instantiation overhead.
Fix comment that matched nothing.
Code simplification

Factor out duplicated ExecuteBlind() code.
In ExecuteBlind(), move connector.SetBackendCommandTimeout() into the locked section.
Fixed wrong comma putting in AddFunctionColumnListSupport of NpgsqlCommand.Rewrite
Support for EFMigration and Database creation in EF6+
Setting default value in case of NOT NULL
Support for default empty byte array and removed rowversion from setting default updated tests
Cleanup

Eliminated all 1591 warnings by converting Java doc comments to xml, writing a few good comments, a lot of stub comments, and by supressing 1591 for a few entire files.
In CopySerializer, change a few public writable static strings to const.
Protocol Version 2 Support Removal

Remove support for backend protocol version 2.
Optimize NpgsqlQuery for re-use.
Introduce a number of static NpgsqlQuery objects for often used internal commands.
Merge pull request #153 from tyler-nguyen/master

Fixed wrong comma putting in AddFunctionColumnListSupport of NpgsqlCommand.Rewrite
Fix previous commit

isFirstOutputOrInputOutput was declared within the loop, needed to be moved out.
Cleanup

In CopySerializer, convert the huge conditional chain statement to a switch; a little faster, and a lot more readable.
Bump version to 2.1.0-rc1
EF Migrations unit tests use connectionStrings provided by TestBase instead app.config
Adding EFTestBase for EntityFramework tests
Going back to TestBase
Removing CREATE EXTENSION and adding "select * from uuid_generate_v4()" check...
Fix a bug where the connection state was throwing an exception after having been disposed.

http://msdn.microsoft.com/en-us/library/system.data.idbconnection.state(v=vs.100).aspx suggests that the state property should be readable even after disposing.
Add test to PR #164