Merge pull request #170 from braydonf/coverage

Improve test coverage and cleanup.

Author: pnagurny

example/index.js

@@ -12,7 +12,7 @@ function getDefaultConfig() {
     config: {
       datadir: process.env.BITCORENODE_DIR || path.resolve(process.env.HOME, '.bitcoin'),
       network: process.env.BITCORENODE_NETWORK || 'livenet',
-      port: process.env.BITCORENODE_PORT || 3001,
+      port: Number(process.env.BITCORENODE_PORT) || 3001,
       services: ['bitcoind', 'db', 'address', 'web']
     }
   };