2.0.1 pre release

Changes since 2.0.1pre2:

Fixed bugs:

• default password strength was not used for new sites (Issue #23)
• Password entry was not detected by some sites (accounts.firefox.com) (Issue #19)

New features:

• Option to forget master password within a time limit. (Issue #22)

In addition this version tries to improve situations where username and site settings apparently disappears for unknown reasons. (Issue #24)