Timing improvement for subgraphs
Some simpler replacement tests
Component for getting directory name from path
FilterPacket component
MakeDir component
New CopyFile component
Enable logging also subgraph events
Component that only transmits the last packet it got
Tests for UniquePacket
Tests for LastPacket
Sending to specific socket doesn't activate sending to all sockets
Level data output to remove the group hierarchy
Component for handling sessions
Add reference to Noflo top-level object
Add annotations and provide session existence testing
Forward groups as well

Logically, it "continues" the flow from the previous process, so groups should be preserved while replacing the data with a new, predefined string.
Merge branch 'refs/heads/pre_coding_standard_change' into develop
Merge branch 'refs/heads/develop'