Enable eslint import checks and fixed the reported errors (#878)

Summary:
Pull Request resolved: https://github.com/facebook/flipper/pull/878

1) Enabled eslint error reporting for unresolved imports and fixed all the errors
2) Enabled eslint for typings (d.ts) and fixed all the errors

Reviewed By: passy

Differential Revision: D20335151

fbshipit-source-id: 7b142281a406b32df0f02a5cd0d7d05eba941acd

desktop/.eslintignore

@@ -1,4 +1,3 @@
-*.d.ts
 *.bundle.js
 src/fb/plugins/relaydevtools/relay-devtools/*
 latest
@@ -12,3 +11,4 @@ dist
 website/build
 react-native/ReactNativeFlipperExample
 scripts/generate-changelog.js
+static/index.js