electron app:

- add file association for .wacz
- support opening wacz, warc, har files via double-click from os (fixes #24)
- command line: support opening files via command line, as well as specifying --url and --ts
- support cmdline args via 'yarn run start-electron <file> --url <url> --ts <ts>'

package.json

@@ -17,6 +17,7 @@
     "lit-element": "^2.3.1",
     "marked": "^1.0.0",
     "mime-types": "^2.1.27",
+    "minimist": "^1.2.5",
     "pretty-bytes": "^5.3.0",
     "register-service-worker": "^1.7.1",
     "split.js": "^1.6.2"
@@ -52,7 +53,7 @@
     "start-prod": "http-server -p 9990",
     "pack": "CSC_IDENTITY_AUTO_DISCOVERY=false electron-builder --publish never",
     "pack-signed": "electron-builder",
-    "start-electron": "NODE_ENV=development electron ./dist/electron.js",
+    "start-electron": "NODE_ENV=development electron ./dist/electron.js $1",
     "start-jekyll": "yarn run build-docs && bundle exec jekyll serve",
     "dist": "yarn run build && yarn run pack",
     "release": "yarn run build && electron-builder"
@@ -130,6 +131,12 @@
         "name": "HAR File",
         "description": "HAR File",
         "role": "Viewer"
+      },
+      {
+        "ext": "wacz",
+        "name": "WACZ File",
+        "description": "Web Archive Collection Zipped (WACZ)",
+        "role": "Viewer"
       }
     ]
   }