- Renamed to PasteSelectedCommand

- Renamed to OptionsCommand.

- Renamed to ImportTableCommand.

- Renamed to OneLevelTreeManager

- Renamed to ImportTableCommand.

- Renamed to ExportTableCommand.

- Renamed to ExpandGroupsCommand

- Renamed to DeleteGroupCommand.

- Renamed to CutSelectedCommand.

- Accidentally renamed usages of DataProcessorCommandAdapter to
CommandAdapter rather than QtCommandAdapter. This commit fixes that.

- Renamed to CopySelectedCommand

- Renamed to CollapseGroupsCommand

- Renamed to ClearSelectedCommand

- Fixed remaining compile and link errors.
- Updated mantidqt.sip

- Moved ParseNumerics to the MantidWidgets module rather than
MantidWidgets/DataProcessorUI.

- Added namespace to cpp files.
- Fixed some related compile errors due to forward declaration
placement.
- Fixed some mistyped namespaces in header files.

- Added DataProcessor as namespace for most headers in the
DataProcessorUI folder.
- Renamed some usages of AbstractDataProcessorTreeModel.

Update release notes with performance improvements

Fix scientific interface interdependencies

This should be temporary and removed once a proper separation can
be completed.