This fixes the "used space" to be based on the unencrypted size, not
encrypted size, to be consistent with how quota/space is handled when
encryption is enabled
The cache isn't cleared properly because unlink() doesn't remove the
cache entry which caused side-effects when reusing the same file name
(which randomly happens when time() returns the same value)
This fix first makes sure the unit tests don't fail any more.
The unlink() case with the cache will be investigated separately.
Read/write interoperability working through web UI and WebDAV
New class Session for handling session data
A few new unit tests
Some additional unit tests are now failing, esp. legacy enc related ones
- Added methods for sealing data with multiple keys
- Added method for encrypting data, generating iv and keyfile, and returning both
- Added 6 unit test cases (containing 12 tests) for Crypt class
- Commented out old unit tests for now
