8175235: type inference regression after JDK-8046685
Reviewed-by: mcimadamore
Contributed-by: vicente.romero@oracle.com, maurizio.cimadamore@oracle.com

8181370: Convert anonymous inner classes into lambdas/method references
Reviewed-by: jjg, rfield, mchung

8159970: javac, JLS8 18.2.4 is not completely implemented by the compiler
Reviewed-by: mcimadamore

8156954: javac incorrectly complains of incompatible types
Summary: Add heuristics to pick best stuck constraint as per JLS 18.5.2
Reviewed-by: vromero

8152411: Regression: inference fails to reject incompatible upper bounds
Summary: Wrong undet variable comparison in propagation optimization
Reviewed-by: vromero

8076031: javac should use deterministic data structures for managing free type listeners
Reviewed-by: mcimadamore, jjg

8067767: type inference performance regression
Summary: Overhaul implememntation of inference incorporation
Reviewed-by: vromero

8046685: Uncompilable large expressions involving generics.
Summary: Improve inference propagation logic so that unnecessary inference variables are not propagated.
Reviewed-by: vromero

8078093: Severe compiler performance regression Java 7 to 8 for nested method invocations
Summary: Add infrastructure to avoid combinatorial explosion of method argument attributions
Reviewed-by: jlahoda, vromero, dlsmith

8132215: class InferenceContext should live in a separate file
Reviewed-by: mcimadamore, jlahoda