unified JetVisitor & JetVisitorVoid
added JetVisitorVoidWithParameter
added CFPContext to avoid recreating of CFPVisitor all the time;
used JetVisitorVoidWithParameter
added tests for control flow
fixed exponential building of cf graph
if there was en error in chained qualified expression
fixed bug in renderer for violated upper bound error
added special error for object literal expected type mismatch
and positioning strategy for it
check incomplete equality
KT-4341 No resolved call for right-hand side of equals expression
 #KT-4341 Fixed
fixed 'getSciceContents'
do not throw an exception when some slices were overwritten