STYLE: Avoided redundant this->GetComponent( componentName ) calls.
STYLE: Avoided redundant this->GetComponent( componentName ) calls.

Now using `ownProperties` (the result of `this->GetComponent( componentName )`) twice, instead of once, in both `ComposeWith` and `MergeProperties`, for both components and connections.

Ensured that `ownProperties` is not modified when ownValues is retrieved, by calling `std::map::find`, instead of `operator[]`, and using `const`.

Fixed MSVC Warning Level 4 warning C4456: declaration of 'ownProperties' hides previous local declaration

kaspermarstal/SuperElastix,kaspermarstal/SuperElastix,kaspermarstal/SuperElastix,SuperElastix/SuperElastix,SuperElastix/SuperElastix,SuperElastix/SuperElastix,SuperElastix/SuperElastix