Added import/export to the demo app

- discovered private key length was wrong - fixed
- as things are broken anyway, refactored flyway migrations - you'll need to delete ~/jabit.*.db

demo/build.gradle

@@ -22,6 +22,7 @@ dependencies {
     compile project(':domain')
     compile project(':networking')
     compile project(':repositories')
+    compile project(':wif')
     compile 'org.slf4j:slf4j-simple:1.7.12'
     compile 'args4j:args4j:2.32'
     testCompile 'junit:junit:4.11'