Fixes for Windows #57
On Windows, the lmdb file is immediately allocated at full size (500 MiB each). So we have to limit the size.
Windows need an organization name for
QSettingsto work. So an organization name is added for Windows target.
This PR is based on #50. The changes for this PR is at the lastest commit.
Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?