added admin-lte-dotnet link to docs/implementations.md
added admin-lte-dotnet link to docs/implementations.md

almasaeed2010/AdminLTE,oyjt/AdminLTE,slachiewicz/AdminLTE,garrettwong/AdminLTE,almasaeed2010/AdminLTE,oyjt/AdminLTE,oyjt/AdminLTE,slachiewicz/AdminLTE,garrettwong/AdminLTE