Updates from PR#127 from Lars-Erik. Had to manually copy in the changes because the PR was closed.

Adds Import of Dictionary Items to the PackagingService along with tests and a fix for the DictionaryRepository.

Conflicts:
	src/Umbraco.Tests/Services/Importing/ImportResources.resx
	src/Umbraco.Tests/Services/Importing/PackageImportTests.cs
	src/umbraco.cms/businesslogic/Packager/Installer.cs
Adding Export of DictionaryItems including test

Conflicts:
	src/Umbraco.Core/Services/PackagingService.cs
	src/Umbraco.Tests/Services/PackagingServiceTests.cs
Adding languages xml to existing xml file for testing purposes
Moving events out of the repository scope.

Adding Get Language by Iso Code method
Adds import and export of languages along with tests

Conflicts:
	src/Umbraco.Tests/Services/PackagingServiceTests.cs
Removing some internal experimental stuff that isnt used
Updating the legacy Installer class to use the new methods in the PackagingService

Conflicts:
	src/Umbraco.Core/Services/PackagingService.cs
	src/umbraco.cms/businesslogic/Packager/Installer.cs
Fixing merge issue
Adding new methods to the IPackagingService interface
Adding event handlers to new import and export methods in the PackagingService