Drop nearly identical IncrementalGenerationStrategy implementations, use supplied defaults
IncrementalGenerationHandler uses values of model generation hash obtained from the strategy to populate 'generated' files regardless of 'incremental enabled' state. This effectively means empty 'generated' file when incremental is turned off.  Thus, IncrementalGenerationStrategy is not only about incremental generation, but a model state provider (factory of generation hash) also
MPSSPRT-17 No files in File System view: isLeaf() shall be false for classes overriding doInit() to trigger child update
Drop deprecated TreeTextUtil, get ready to drop few others.
Scan template model dependencies: don't use boolean argument to select context of method call, use appropriate method directly
Introduce alternative to TemplateModelScanner, to analyze languages essential for two distinct aspects of generation phase - queries and target/produced languages