Add seeds script

Allows to seed the smart contract with development data specified in
config/seeds.js

Usage:

truffle exec scripts/seeds.js

or

npm run bootstrap which runs them all:
* truffle migrate --reset
* truffle exec scripts/seeds.js
* npm run build-json

package.json

@@ -8,6 +8,7 @@
   },
   "scripts": {
     "build-json": "truffle compile && node ./scripts/build-json.js",
+    "bootstrap": "truffle migrate --reset && truffle exec scripts/seeds.js && npm run build-json",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "repository": {
@@ -21,8 +22,9 @@
   },
   "homepage": "https://github.com/67P/truffle-kredits#readme",
   "devDependencies": {
-    "zeppelin-solidity": "^1.7.0",
+    "ganache-cli": "^6.0.3",
+    "ipfs-api": "^19.0.0",
     "truffle": "^4.1.3",
-    "ganache-cli": "^6.0.3"
+    "zeppelin-solidity": "^1.7.0"
   }
 }