use shared libraries from NPM package

app/shared.js

@@ -1,4 +1 @@
-module.exports = exports = {
-    Errors: require('../../shared/Errors'),
-    Message: require('../../shared/Message'),
-}
+module.exports = exports = require('pied-vcs-shared')

package.json

@@ -27,6 +27,7 @@
     "flitter-orm": "^0.4.0",
     "flitter-upload": "^0.10.0",
     "libflitter": "^0.58.1",
+    "pied-vcs-shared": "^0.1.1",
     "stream-skip": "^1.0.3",
     "tmp-promise": "^3.0.2",
     "websocket-stream": "^5.5.2",

yarn.lock

@@ -3236,6 +3236,11 @@ picomatch@^2.0.4:
   resolved "https://registry.yarnpkg.com/picomatch/-/picomatch-2.2.2.tgz#21f333e9b6b8eaff02468f5146ea406d345f4dad"
   integrity sha512-q0M/9eZHzmr0AulXyPwNfZjtwZ/RBZlbN3K3CErVrk50T2ASYI7Bye0EvekFY3IP1Nt2DHu0re+V2ZHIpMkuWg==
 
+pied-vcs-shared@^0.1.1:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/pied-vcs-shared/-/pied-vcs-shared-0.1.1.tgz#7e183833e3d5f7af808e1edca0b38e50ef527415"
+  integrity sha512-JWVqEUnwbjpL+w5aZCvnmpNk0FRDiarTZvC6Ru41J6jDJwp9YpaOHZh34HvDrXwn6zg1KVvwindUMarllWfKeA==
+
 pify@^2.0.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"