Feature complete (Early access release 4)

The app is now what I consider a minimal viable product, which is what I like for a x.0 release.

Changes from the last release:

• Help button on the login window that takes you to the github home page for the project
• A better readme for the github homepage (is only on this branch, will be on the main branch at release)
• Wrong password error message and interaction flow
• Secret option to change to some envelope style icons, requires plist edit.