Cleaning node and typescript

[blootsvoets]

After doing a pull with a large update (a lot of commits), tsc may give typescript issues such as: csServerComp/Classes/Feature.d.ts(3,9): error TS2300: Duplicate identifier 'type'. This is not solved by gulp clean. It seems the wrong definition files are taken in for compilation when the tsconfig.json file is automatically updated. However, when I do a fresh clone it all works again. It might be good if gulp clean could find ALL stale states so it is almost the same as a new install.