Issue #76 Create minishift directory symlink to accommodate --host-data-dir option

[praveenkumar]

This patch add minishift directory and symlink with persistent storage.

Depend on: https://github.com/minishift/minishift/pull/261

Steps to test:

• Build the iso with this patch
• Get minishift binary from https://ci.appveyor.com/project/hferentschik/minishift-o61ou/build/138/artifacts
• run minishift against built images
• Create some test application on minishift or add a template
• stop minishift
• start minishift => you should have test application configuration or template persistent.

[praveenkumar]

I did test it against minishift and it worked as expected. @LalatenduMohanty @hferentschik please let me know if you have any other suggestions.