Merge branch 'release/20140121'

Conflicts:
	Powershell/BuildScripts/Glass.Mapper.Sc.CastleWindsor.symbols.nuspec
	Powershell/BuildScripts/Glass.Mapper.Sc.symbols.nuspec
	Powershell/BuildScripts/Glass.Mapper.Umb.symbols.nuspec
Merge branch 'master' of github.com:mikeedwards83/Glass.Mapper
Merge branch 'hotfix/PageEditorInNewLanguage'
Merge branch 'release/20140130'
nuget updates
Merge branch 'master' of github.com:mikeedwards83/Glass.Mapper
added virtual to SitecoreFieldConfiguration Copy method
Merge branch 'release/20140318'
Merge branch 'release/20140421'
Make the properties of the Image and File property types virtual to allow the use of mocking in unit testing.
Merge branch 'master' of github.com:drachele/Glass.Mapper into develop