Added 0.9.1 release notes

Made sure default alias isn't printed if it's pointing to non-existen…

…t entry

Added missing inconshreveable/mousetrap transitive dependency

Made JABBA_HOME env be recognized by PowerShell installer

Updated refs to latest (0.6.1) release

Updated refs to the latest (0.6.0) release

Added 0.5.1 release notes

Updated latest version badge (readme.md)

Fixed Oracle JDK installation on Windows 10

Suppressed verbose output on tgz extraction