[v0.6.1] Several bugfixes.

- Since v0.5.1, scheme creation stopped working due to a typo (an extra
$ in front of a variable which content is inserted into the database).
- Passwords are properly stored.
- The Mine Fuse setting can now be set.
- v3.7.0.0 is no longer called v3.6.32.0 in the required version string.
- Downloading "Unnamed_scheme"s now works.