Add interaction click next that always click the element that wasn't clicked before
Trace won't count NoPage in PageCount accumulator
Empty trace won't start a session when resolved
fix a bug in ActionLike.inject where mixin injects overwrite each other, now all implementations has super.inject(...)
fix a bug where backtrace pages from a block include the block twice (one trunked version from realBacktrace, another from rewrite in Block). Getting rid of lazy eval & use dry run should simplify this complex design issue
fix a bug in PageRowRDD where lookup pages consist of pages after flattenPages (this may lose info)
Constructor of NoPage changed to only take the backtrace as parameter
NoPage now has timestamp as well.
add sessionInitialized and sessionReclaimed accumulator
add 1 unit test for injection of nested block
add 2 integration test for fetch and explore of complex traces with blocks