few fixes
uncomment delete leaf from LastLevel when it is not possible
some fixes/refactor in query execution flow (executionQuery() method with derivatives)
refactor query classes
refactor ConditionAttime class
add tests for CFonditionAtTime methods
query result container refactor & tests
"condition at time" query class refactor & tests
reasoning tree refactor & tests
Interface wartości fluentów
CheckState fix
Performing action at time Query added
Action at time query fixed
Vertex tests
tree refactor
Merge branch 'develop' of https://github.com/robrtj/knowledgerepresentation into develop
GetObservationFromTime fix
Refactor reasoning algorithm.
Merge branch 'develop' into feature/interface

Conflicts:
	KnowledgeRepresentationIntelligence/Queries/AccesibleConditionQuery.cs
	KnowledgeRepresentationIntelligence/Queries/PerformingActionAtTimeQuery.cs
	KnowledgeRepresentationInterface/KnowledgeRepresentationInterface.csproj
	KnowledgeRepresentationInterface/Views/Environment.xaml
	KnowledgeRepresentationInterface/Views/QueriesControls/QueConditionAtTime.xaml.cs
	KnowledgeRepresentationInterface/Views/Scenario.xaml.cs
	KnowledgeRepresentationInterface/Views/ScenarioControls/ScenarioAddActionControl/FluentValue.xaml
	KnowledgeRepresentationInterface/Views/ScenarioControls/ScenarioAddActionControl/FluentValue.xaml.cs
	KnowledgeRepresentationInterface/Views/ScenarioControls/ScenarioAddActionControl/SceAddObservations.xaml.cs
	KnowledgeRepresentationInterface/Views/ScenarioControls/ScenarioAddedActionListControl/SceAddedActionsList.xaml
	KnowledgeRepresentationInterface/Views/ScenarioControls/ScenarioAddedActionListControl/SceAddedActionsList.xaml.cs