EF power tool downloadable from here
currently are not compatible with VS 2015. To make it compatible perform following steps-
2. Rename file EFPowerTools.vsix to .zip
3. Open extension.vsixmanifest file and add following
4. Save changes and Rename file to .vsix
5. Install tool
You should now be able to see the Entity Framework option on right click of your project.
Hope this helps