Implement encryption in SQLite3 driver
Remove tests for deprecated backends
Fix / remove more tests
More test fixes
Merge pull request #161 from akavache/actually-encrypt-data

Actually encrypt data
Merge branch 'master' into operation-coalecsing

Conflicts:
	Akavache.Sqlite3/SqlitePersistentBlobCacheNext.cs
Create some basic tests

These tests still don't verify signalling (i.e. making sure that the
input AsyncSubjects actually receive results)
Update perf graphs with preliminary results
Can't modify a dict while foreach'ing even to change the value