Release 0.5.1

[zodern]

• [x] Finished electron api's also work on linux
• [x] Store app id in tingo db
• [x] Store if install finished in tingo db
• [x] Update notification
• [ ] Store app logs in file
• [ ] View app logs in app manager
• [x] File explorer opens up to home folder
• [ ] Open iron node or node debugger for app in app manager
• [x] Task manager only show running apps
• [ ] Task manager stop apps
• [x] Make new app framework closer to electron
  • [x] Have default icon
  • [ ] Get url from window.loadUrl
• [ ] App framework support headless apps
• [x] Migrate terminal app to new app framework.
• [x] Migrate app manager app framework
• [x] Publish bower static package