Bump version to 2.1.0 release

Bump version to 2.1.0-rc1

Npgsql 2.1.0-beta1

Updated for 2.0.14.3.

Bug fix for EF, missing provider manifest.

Fix NpgsqlProviderManifest.Manifest.xml file type.
Bump version.
Add release note and change log.

Build updates

Copied 2012 project files from master, modified for this branch.
Copied Mono.Security files and organization from master.

Npgsql 2.0.13-beta1

Updated for Npgsql 2.0.12 final release