GLR performance
GLR optimizations.
Changed perf.cmd to not measure GC
Refactoring decision tree builders
Refactoring Decision tree building
SparseSwitchGenerator and DecisionTree refactoring
Minor SparseSwitchGenerator optimization
Refactoring out IDecisionTreeGenerationStrategy.
Partial optimization of DecisionTreeBuilder for a sequence of unary elements.
Optimization: Get rid of LR0-reduce states in GLR.
Added Benchmarks.txt
Conflict fixes in c# grammar