Remove unnecessary member variable in SerializationOperation
Cache old document for rollback
Interface with DataStore
Fix documentation warnings
Add virtual dtors for IOperation and its implementing classes
onTransactionCommit makes more sense logically
Merge pull request #179 from digawp/misc-fix

Misc fixes
Set the priority of the task when creating the update query.
Split the query parser from the query parser actions to speed up compiles when just changing the actions.
Separate Graph Model and Controller
Define the SHOW_QUERY class.
Fix warning.
Separate model in one class
Fix VS filters
We order results by a column, order pair.
Move Model to their own folder
Move datastore include inside
Global rename FilterTask to GetTask
Rename the file also
Implementing displaying a show query.