Migrate to Typescript #355 (includes #363)

Some utils to TS #355

Add datafactory type to formula #355

Taskforce compatibility #355

Add fork-ts-checker-webpack-plugin #355

URI to typescript #355

moved typeguards to utils

Datafactory & serializer types,  enums #355

WIP Fetcher & UpdateManager #355

Fetcher WIP #355

WIP Fetcher #355

Continue working on typescript migration #355

Data factory types fix #355

Various minor type improvements #355

Add documentation to typeguards #355

Various fetcher type improvements, use enums #355

Use doc.value instead of doc.uri in update-manager

Update typescript #355

Don't use const enums util supported #355

Fixed tests, improved typeguards, fetcher #355

Rename uriCreator to nodeValue, various ts #355

Fether typings #355

Fetcher & Formula typing improvements #355

Update manager typing #355

Data factory, store, fether types #355

Various type changes, almost no type errors left #355

Replace .sym with factory.namednode

Cleanup

Move typing/type-testing utils to separate file